Gentrification is also a contributor to the problem but it's hard to tell rich people that without them getting mad and blaming someone/something else.
That may be true but I don't think it has much to do with the reluctance to discuss the issue (or to actively play down the importance of it when discussed.)
The only solution for either side is to move away, and if the rich people refuse to pack up and leave the less fortunate sure as hell aren't going to buy themselves plane tickets and skedaddle.
So it kinda makes sense why people downplay it when the only alternative to moving somewhere else is perpetuating false victimhood.