Dad bod isn't an obese, obnoxious dude, but an average Joe with some body fat.
I dunno. I can see how most girls/women would want a dad bod over a fit hunk.
Since most are looking for relationships, I'd say comfort is paramount. As some ladies already mentioned, being with a fit fella makes them self conscious of own bodies even if guy's personality and manners are great.
I'd say similar approach applies to most guys as well. Sure I'd like to shag a princess, but to live with one is another story. Hot girls usually tend to be more high maintenance and demand a certain lifestyle.
Sure Ferrari or Lambo are nice, but it's not an everyday vehicle. I'd rather have a luxury SUV as a daily driver.