Absolutely not.
At a barest minimum, some names like Terry are unisex. Other names like Andrea are masculine in some countries and feminine in others. Finally, say you, an English speaker, encountered the web site of a person named Fang. Are they a man or a woman?
Pronouns in the bio help resolve confusion in all these cases, and that's before we get into LGBTQ issues.
Isn't that among the things which should stay at twitter?