not the same.
imposing the full measure of sameness we are capable of would indeed decimate our world and its system and much of our humanity. for reference see Kurt Vonnegut's "Harrison Bergeron."
His central point I hold to - we should not seek to mitigate the differences in people's abilities. Only superficial things like appearance do we seek to mitigate.
So the question to ask if you want to know if a difference has any place existing is:
1) is the difference necessary, i.e., can we eliminate it if we choose to?
2) is the difference perpetuated only by custom, and not by a practicality?
if the answer to both of these is yes then it is firstly a difference i hope will disappear and secondly a difference that WILL disappear provided the continued advancement of our egalitarian civilization. it is only a matter of time or civilizational collapse.
So, let's try some examples:
1) Sexual organs
2) Codes of dress
3) Abilities in sport
4) Attractiveness to mates
5) Hair colors
6) languages
1 is necessary in that we cannot meaningfully change this. It is also practical in that sexual organs are our primary means of reproduction. These differences will remain if technology doesn't much change.
2 will coalesce because as I was saying our modes of dress are nothing more than a product of historical norms. Just as women are now wearing the clothes of men, men will more and more wear the clothes of women as feminism achieves total victory, eventually blurring the lines between men and women's fashion totally. Physical differences will remain but fewer and fewer artificial and arbitrary differences will persist. The last to die, of course, will be those that exaggerate womens' sexuality thanks to the sexual behavior of males, but they too will go - if they can do it in Muslim countries ("it" meaning create a culture of non-sexual dress) then it can be done elsewhere, if in a vastly different way for vastly different reasons
3 - these will not go away because it is competition and difficulty that gets our blood boiling. differences in ability will remain because they are what make us individual - if they are removed there will be pushback until the state of nature is regained in this regard - see Harrison Bergeron
4 - These things may appear to change but will not actually change. People may begin to dress similarly across cultures and genders but are unlikely to change a hierarchization in terms of attractivess - as long as we are interested in sex, we will continue to publish "hot lists" and such, no doubt.
5 - Hair colors. This may begin to coalesce thanks to dyes, and indeed already has to the extent that any person can have any hair color. But what is more important is the eventual combination of humanity's genetic material into what amounts to a single phenotype, and thus a single hair color, probably black or dark brown. same with skin color and other "racial" features
6 - this will continue to coalesce for the same reasons other topics of globalization are in the middle of unifying, but there is a significant loss associated with language diversity in terms of cultural intelligence that may merit the attempt to preserve languages, although the difference is usually perceived by ordinary people to be a nuisance and an arbitrary custom which leads people to strive to learn each others' languages. as long as this force is at play and no collapse comes to our communication technology it is reasonable to expect all people will speak a mutually intelligible language one day.
see what i mean?
Coming back to the beards allow me to put my choice to shave (for the reasons we've been discussing anyway) in different terms.
If a women who puts on pantsuit (an outfit whose appeal draws from its similarity to men's business suits, affording some of their legitimacy, credibility and power to women) is conforming to patriarchy by assuming elements of masculinity, which has up until now been the primary motion as women are liberalized and enter male domains, then my choice to shave is so-far-uncommon example of a common male choice to conform to matriarchy, i.e., to make oneself look more like a woman. it is thought men began to shave originally so as not to scare away women, because beards are shown among both men and women to engender feelings of mistrust and unease - stemming from the difference, just like people are shown to be uneasy around people that don't look like them more often than with people who resemble themselves.
So that's why I embrace it - our culture currently contains precious few examples of opportunities for men to embrace matriarchal norms of personal appearance while remaining within cultural legitimacy.