I'm not trying to minimise the real-world impact of research! I guess I'm saying in some fields (e.g. IT, and startups in particular) there is much tighter feed

I'm not trying to minimise the real-world impact of research! I guess I'm saying in some fields (e.g. IT, and startups in particular) there is much tighter feedback between ability+effort and real-world results. I can imagine two situations as a researcher where constant criticism is damaging. (a) If you've built your self-image on being the best, and suddenly you're a small fish in a big pond, you're left with not much. (b) If you want to make a real difference but the culture of negativity/elitism holds you back, you end up frustrated. But if you are actually making a difference then you can probably withstand any amount of sniping!