Character Builds & Armor Limitations-Strength Bias from Developers

Presently near the very end of Nioh 3, and consistently receiving armor from slain enemies.

The sheer bulk (over 90%) seems to require strength builds and/or constitution builds. . .which I did not pursue (skill, heart, magic build for this game). I think I left 'strength' at '10', while I have 'skill' at 51, 'heart' at 32, and 'magic' at 40. Thus, most of the armor is unavailable. My understanding is that a non-strength and/or non-constitution build would then need to simply invest in leveling-up/upgrading armor at the blacksmith.

Is there something I'm _missing_, in terms of understanding, about why armor in this game seems so skewed to a specific set of builds?