An anecdote. I am 33, married for 10+ years now. Taking care of yourself is not something most people would say I do. Never had any problems attracting mates (although I suppose not taking care of yourself is more socially acceptable in university).
To amplify your anecdote with my own: I am 6'3", 215lbs, 12% bodyfat per DEXA scan, with a 21.5 inch bideltoid and a 465lb deadlift.
To this day, my wife is the only woman on Earth who has ever noticed my existence (and even there, she's only with me for the income provisioning).
My pet hypothesis is that sexual success with heterosexual women almost exclusively boils down to facial aesthetics: symmetry, midface ratio, interpupillary distance, collagen and elastin production, mandible forward growth and width, eyelid exposure, zygomatic protrusion, orbital bone thickness and radius, ramus length, etc.
You're very likely blessed with good facial aesthetics.
But who knows? What I do know for certain is that the coefficients of height, wealth, and muscularity are precisely ZERO in the attraction equation.
