Yes, I play a higher-level wizard who is always running out of spell slots by the end of the dungeon, casting wimpy cantrips and hiding behind the martials. As nature intended.

It’s all about the DM saying no to long-resting whenever and wherever. It may seem like common sense that the players should be able to say when the party should rest. But the game doesn’t work, especially at high levels, unless the DM controls and limits them.