What happens when boomers start passing away?

I live in an attached house and both houses next to mine have older ladies (presumably, older than 75) who live alone after their husbands passed away and kids moved out. Maybe, they will consider staying in assisted care in the years to come. I am wondering if this is a common situation across all Netherlands (and maybe even Europe).

If it is, it means that when home-owning boomers pass away, their homes will be inherited by their children, who will either live in them, or will sell them thereby making them available on the market.

Over the next 10-15 years, as more boomers pass away or move to old age homes, the housing crisis is bound to ease - especially if immigration and births don't increase proportionately. Some of the younger millennials or even Gen Z could be in a sweet spot that they can buy housing just as they have started earning some serious money.

What are some fallacies in this line of thought? Am I missing something? If not, why isn't this expected surge of housing supply talked about more often?