I kinda agree, but because most of the times I've seen using that form ("why don't we just do/use X instead?") It was from somebody that had read that $bigcompa

I kinda agree, but because most of the times I've seen using that form ("why don't we just do/use X instead?") It was from somebody that had read that $bigcompany has done/used X for their use case, but they had no direct experience themselves -- meaning that they had no idea about the kind of problems that X would bring and/or ACTUALLY solve. HEY, WHY DON'T WE JUST END WORLD HUNGER?