Traveller's world gen forces retcon on an almost system basis. I've long since given up stressing over the fact that if you think about it for just one millisecond, you will question why the hell there are 200,000 people living on an airless rock when travel to a garden system within a few parsecs is so quick and cheap.
The retcon becomes the fun part of it. Making up some song and dance to be as believable as possible and fit with what the map has offered.
It does mean I don't take my Traveller games too seriously but I've retconned that to being a good thing too
From a Traveller POV, for me, the important thing is what goes on on the planet that my character can interact with.
Statistically, there aren't going to be that many hospitable planets, how about the option of rerolling if a secondary planet turns out more hospitable than your already rolled main world?