> The government lets you deduct your mortgage interest from taxes
This is effectively not true anymore.
> Also, what am I going to do instead, rent? My rent can go up $50 bucks a year where my mortgage payment is locked in. For most people, home ownership is the safest and best way to build a retirement nest egg and a tangible asset to borrow against in times of trouble.
I'm going to push back a touch on this, it's not really true. Mortgage rates don't usually change in the US(because we take 30yr fixed mortgages generally). But housing costs do go up for owners: property taxes, and property maintenance.
Generally renting vs owning is mostly a wash, sometimes one is cheaper than the other, just depending on the local housing market.
Historically property has a about a 1%/yr real rate of return, so housing basically keeps up with inflation, but not much more. I know recent history makes people think this is not true, but it really is. It seems unwise to think this recent history will continue forever. Equities historically get a 4-6%/yr real return, drastically outperforming the historic returns of real estate.
But yes, lots of people tend to not save for retirement, making their houses their de-facto retirement savings. The problem is, they have to live somewhere, making their house value somewhat hard to spend in retirement.