Alternative: you can spend that same 15-25 years paying roughly the same monthly amount in rent at various places, and have exactly zero equity or assets to show for it at the end of the period. Zero zilch nada, the money is burned and gone forever.
Frame it in that sense and it's a no brainer.
In the current market though either try to get a variable rate mortgage or be prepared to refinance it in a few years if/when interest rates cool down. the current rates suuuuuck.