WOTC is banning selected language from the books, which is a partial ban. By expunging parts of the book, they can censor ideas and change the original meaning of the book. Plus, it's a stealth ban--you gradually chip pieces of the material away, so it's less noticeable, and then you chip another piece, and another piece, until you've effectively banned the book. By not banning the entire book, it can be make to look like it's not a banning at first glance, which also allows the censors to deny that they're banning by using a Motte and Bailey strategy.
For example, WOTC is banning all references to orcs being evil, and yuan-ti being cannibals but ignoring stereotyping for all the other humanoids (as if their descriptions are any different). In a few months, you edit hobgoblins. Then you justify each follow up by saying "well nobody minded orcs and hobgoblins, so why not goblins". "Nobody minded censoring cannibalism with the yuan-ti, so you shouldn't have any problem with censoring cannibalism with Gnolls." Wash, rinse, repeat.
What I find the most disturbing, is that there seems to be no realization that if you endorse censorship, then you open yourself to future censorship by people who disagree with you. Better to not censor at all, than to erode an inalienable right that applies to all.
So, you're arguing that IP owners shouldn't be able to exercise control of IP they own?