And as for random meetings, there is no one who could discourage rests due to the fact that they are random, which means that in the worst case you can always load the game.
This is exactly the point of random encounters.
They create a sense of danger so players will think about the right moment to sleep (not too late, not too fast).
But they don't limit anything because you can always save/load if you're in a bad situation.
Random encounters aren't made to "limit" resting, they are made to make resting a gameplay mechanic rather than just a button.
Even with a D/N cycle they could not really apply RAW 1 long rest/day. What if we're just stucked ?
Keep in mind that we're only talking about random encounters during resting. Most peoole don't like them in exemple in WoTR (including myself) because you have wayyy too much encounter while you're traveling.
It's not really a problem while resting and it could be VERY cool in BG3 considering that the camp could handle scripted encounters rather than really random ones.
