Cold water swims and wetsuits

First, I know "cold water" means something different to everyone. I live in Florida, so cold water to me is anything below about 70 F. However, I have a question/comment about using/not using wetsuits in cold water swims. For most triathlons, if the water temp is below 78 F, they allow wetsuits...I think it's more like 75 F or so for the pros. So, I'm wondering why so many OW swims don't allow or (for safety) require wetsuits? There seems to be this purist mentallity that using wetsuits, no matter how cold the water is is just wrong. Maybe in some ways that is true, but putting 100s of swimmers in 60 F water for a 5k swim with limited safety boats seems dangerous. How many have actually swam in 60 F water for that long? How many actually know they can handle this water temp for that long? How many will recognize hypothermia symptoms and stop? How many can actually get help quickly if there is a problem? Sure, some of these races have the wetsuit division, but it's always considered not ranked and seems to have this "outcast" type feeling behind it. Should football players not use pads because it isn't manly or pure? Should baseball players not use gloves to catch balls? No, because many will get hurt and it is dangerous. Why is using or mandating wetsuits not the same for water temps that are say below 65 F...or some number anyway? They provide safety to the swimmer by preserving core the temperature and flotation if someone has a problem with the cold water. Yes, they do provide an advantage in the water because of the flotation and being more streamlined, but if everyone is in a suit, it doesn't really matter. And, the reason for wearing the suits is because the water is cold, not because they want to go faster, like the how the tech suits are used. Anyway, just some thoughts and questions for the group. Dave