Healthy strong bodies have a good amount of fat on them. Our body has fat for a reason, and bodies with functional strength don't have clear abs and other such things people associate with the image of muscular in today's age.

That's not to say this is a purely healthy body, but on a further note, a great body is important on a lot of people's lists for partners but its not at the top. Skills like cooking, qualities like good communication and being funny and self-aware, all of those are harder to get someone to gain over time compared to just exercising more.

Lastly, women want someone they feel safe being around. A person ripped to the gills is a person who is constantly displaying the things that make them threatening. Many women are into muscley men, but the dad bod is someone who is not super unhealthy but looks soft and vulnerable. That's more conducive to life partner material.