It is true that you get some very high rated puzzles that are very easy - like M2's that aren't particularly complicated. But in those puzzles, the success rate is often surprisingly low, like 60% or so. I think because people think "that must be a trap" and go for something else.
The way puzzles are rated by chess.com is really flawed. On another sleet... I mean site, puzzles' ratings are active, and continue to change as they are played. Chess.com puzzles ratings are fixed after 100 attempts.
I am embarrassed to say how much time I dedicated to figuring that out....
Maybe it would be possible to have a chess.com answer to know if they changed something ?