It's more so to avoid needless chat drama even though I believe having to walk on eggshells with even trying to express a negative statement is very silly and dumb for it to be grounds for punishment.

But it can be done, so instead of saying to someone "Your strat is bad". If you word it out with "let's rethink the strat" then it would still convey the actual need to do what you wanted without it being just a simple callout.