How did you arrive at that conclusion? It's fairly well established that boxing gloves have dramatically increased both number of punches to the head as well as the force of the punch. You don't bare-knuckle punch someone in the skull much, it hurts the person doing the punch not just the one being punched. Gloves change that dramatically, resulting in not just more punches to the head but also harder punches to the head (more weight behind the punch from the gloves themselves if nothing else).
Boxing hasn't changed back to bare-knuckle because it would make the sport more gruesome visually even though it would almost certainly be safer for the participants.
any change that would bring the head punch count down to ufc levels would likely have similar safety improvements.
The evidence is really sketchy but early research indicates Thai boxing has a bigger incidence of brain trauma than western boxing than ufc and boxing do. The glove is essentially the same.
It is just as likely that the brain trauma differences are due to the dramatically less number of hits taken. This has more to do with the rules than the gloves.
We can be reasonably sure of that because boxing could change the glove types trivially and haven’t even in places that have changed other rules for safety (youth & Olympic boxing).