I do think that the book carry some important messages like questioning authority, being agents of one's own life. On the other hand you it is rather conservative and some bad stereotypes.

But the question is: for which novel doesn't this apply, too? I think one can look past those things if one looks at the overall message here. Also, the universe and the fandom has developed since the original series. Look at the game: its very diverse. Ok, you still have the antisemetic stereotypes, but its definitely a step forward.

So yes, I think the H.P. still has something for society to profit from. The popularity also speaks for itself. If you like it or not, it will stay a part of society for a while.

So instead of banning the whole thing (which is unrealistic in the long run anyways), I think it would be good to embrace its healthy parts for the Fediverse.