I feel like the narrative surrounding defensive versatility has been kind of hijacked over the past year or so. There is a clear difference between being able to switch everything, and legit being able to guard everybody. The only player who I believe would be able to lock down every position is Kawhi, which is kind of what makes him utterly amazing. Lebron (in my humble opinion) and Giannis can guard 1-4s, but both would probably struggle against 5s. I Think Kawhi could handle most 5s due to his quick hands and his amazing defensive awareness.
Being able to switch everything, while important, is not the same as the traits listed above. Bender should be able to guard 3-5s (quickness to stay with most big 3s, and length to stop modern 5s), while being able to switch onto guards as well for short bursts in the pick and roll. But by no means do you stick a defensive assignment for Bender on the Chris Pauls of the world for a game.