Looking at this planet, it's less likely to happen. Maybe high density (water) makes tools less useful, and thus hands less useful, since you cannot move a to

Looking at this planet, it's less likely to happen. Maybe high density (water) makes tools less useful, and thus hands less useful, since you cannot move a tool particularly fast under water, compared to on land. I suppose you've tried throwing a stone underwater -- compare with throwing on land. From this seems to follow, that creatures with human like intelligence, are less likely to appear, if the density of the liquid or gas surrounding them, is too high. (Dolphins are bright but not that bright.)