You can just as easily save a life, get your dog from a breed rescue organization. Then you’ll know what you are getting.
I was lucky enough to get my purebred Keeshond from the animal shelter. The delight of my life for 15 years, never had a sick day in her life.
I don’t see any advantage in mutts. Many are really great little dogs but they are not in any way superior to purebreds.
They usually lose some genetic defects of purebreds.