Id say that the biggest problem is that the dmg section quoted by
@Maxperson really only applies to tier1 PCs and breaks down as players move through tier2 into tier 3 levels.
@Maxperson mechanics that support the GM in limiting excess and the advice is pointless because of the reasons described above. The rest rules themselves provide extreme support in resisting a gm who is unreasonably restrictive but when it comes to the idea of players with short rest classes having an unreasonable expectation class design wotc & the ruleset itself does not even acknowledge it as
possible for the players to have an expectation of excess.