Horwath
Legend
because of STRangers.The concern is WIS and DEX cover a lot of skills already, common saving throws, attacks and AC, and in the ranger's case the DC of his spell list that would exceed other spell casters. That's already a lot so adding in STR too because why?
Sure you can put +4 STR or DEX, but STRangers already have in bad so why not give them something extra. and +4 STR for DEX and WIS rangers will mean next to nothing. 8->12 STR is nothing to write about.