Tony Vargas
Legend
It would address half the problems of the idea, yes - if stats scaled like hps, which strikes me as impractical.Would it change your mind if stats went higher than 20? It was stated stats go higher. That passage was for starting characters max was 20. And I disagree if you drop someone's wis score to try and sneak by them that makes sense to me.
The other half of the problem - the 'death spiral - would remain, though.
If "stat damage" did not reduce your modifier associated with that stat, and/or if you got phantom 'stat hps' that scaled with level and buffered against actual stat loss, it might be practical - but, at that point, most of the desired gain would also be lost.
I do think that a 'grittier combat' module might be a place for penalties to stat rolls, or temporarily reduced stats, perhaps as a part of a system for tracking long-term afflictions like severe wounds, curses, diseases, or slow/progressive poisons.