This is sorta the same defense as "#NotAll(X)". Because, like, yeah, obviously there are plenty of older progressives. But... The issue at hand here is one of power. Older generations have more wealth on average and hold more conservative views on average. It's sorta on them to use their positions to make lives easier on those younger and less fortunate than themselves, and unfortunately for the rest of us, they are less likely to do so. And I say this with a boomer grandma doing her fucking best protesting outside ICE facilities.
To pretend there isn't an age bias is silly. To pretend there is only an age bias is also silly. But it does exist, interrelated to wealth and power disparities that everyone is suffering from. So, you know, fuck boomers. If you don't like hearing that, then really reflect on what that says about you.
In closing, yeah, the problem won't simply die away, but I ain't gonna pretend it doesn't help, even if it isn't every boomer's fault.