If physical fitness only means big muscles and a 6 pack to you then you’ll likely encounter other detriments to your health over time. Fitness has more to do with your ability to function and perform in any given scenario without suffering from aches and pains- during and after.
Without prioritizing function in your training plan your health can suffer. Dysfunctional muscle mass compressing your ribcage can smash your intestines together and lead to GI issues. Or your lungs can no longer inflate properly so your basic nature to breathe becomes a big problem. Overly developed pecs compromise your posture, pulling your head forward out of alignment, leading to “unexplained” headaches that you’ll likely be prescribed meds for, entering the detrimental cycle of side effects that you’ll need another medication for…
You can’t have health without function. Prioritize function during your workouts to develop physical fitness and physiological well-being in the long run.