Boomers say that because historically, with increasing age people usually also managed to have some things they might want to conserve, like a home and some financial assets to cover their retirement. I’m in my mid thirties and the only feasible way for me to ever own a home is inheriting one. My retirement plan is to die in the revolution. I have nothing to be conservative about
I’m in my 30s and fortunate to have a house, but as I age I become more liberal.
I grew up with conservative parents and mostly conservative extended family as well. It wasn’t until I was older and in college that I started to become liberal. Before that I considered myself a Libertarian because I hated the two-party system and didn’t identify closely with any other parties.
I can’t imagine anyone that isn’t in the the top 1% that considers themselves conservative unless it’s based purely on hate or ignorance.
Generally, what it used to be is that people got more liberal as they got older, but society became more liberal faster.
Nowadays, millennials are getting older and mostly keeping up with liberal trends because we have so little invested in the status quo to slow us down from changing with the times. Amongst other factors.
The way I see it, being selfish isn't inherently bad -- there's nothing wrong with looking out for number 1, provided it's not at the expense of others. There's a difference between being selfish and being greedy, of course. The latter is a pretty bad character trait, IMO.
There have also just been shifts in how us younger generations view the world, likely thanks to the internet. I'm in my 30s and own a house, but every year that goes by I seem to get more and more liberal. Partially thanks to how insane American conservatives are in many aspects, but also realizing that the views of the left are the only logical way forward.