Your opinion may differ, but in the absence of a conflicting researched position, I will take the advice of Dr Stuart McGill found here:
It’s more complicated than “you will get stronger with a belt or without a belt”. It’s not like I am incapable of drawing such an obvious conclusion on my own - but thanks for the vote of support
I am a fan of Dr. McGill, am familiar with his work and would agree that a belt should not be used for the majority of training. That said-This is a Strength Sports Forum, and as such Strength Athletes ‘when appropriate’ use the “tools of the trade”. Belts, wraps, chalk, etc. You mentioned belts are O.K. for maximum lifts in a post prior to the one I’m quoting above. Dr. McGill’s objections to belts are based on his belief that a belt alters the firing patterns(I tend to agree).
During a maximum attempt on ‘money’ movements would be when you would want to alter firing patterns the least. Think about that! The reason it’s called training is because you are doing exactly that. So you are suggesting that the best approach is to train/teach your body to perform a movement in one manner and then when you intend to place the greatest demand on yourself-do something (in this case-wear a belt)on purpose that changes the feel of the lift, not to mention alter the firing patterns. That just doesn’t make sense-even to Dr McGill.
It’s not any more complicated than this…the belt is tool, if misused they lead to injury(just like a chainsaw), if someone doesn’t understand how a tool works-leave that work to those that do.