My retirement position is 100% in the U.K, where state pensions (pitiful as they are) are pay-as-you-go (ie the contributions of the current labour market are used to pay the current retirees). There is no collective state fund that accumulates and then later pays out. I have a personal pension, like most, which doesn’t have a defined position in real estate (although I’m sure some of the stocks in the fund would be affected by a real estate crash, both up and down).
So yeah, like most people, I don’t want to socialise losses in somebody else’s investment nor do I expect anyone to come and rescue my personal pension if it tanks based on some global change.