But if you stop breathing, there are some folks out there who may just forget how to start breathing again.
Yeah, namely the people who came up with the idea of no breathing underwater.
The pool owners obvisously don't want any potential future lawsuits.
Yes. With pools and swimming (and swimming underwater) being a relatively new thing (people not being used to these things) I can see where they might have reason to worry. Better to not allow breathing underwater and let's wait and see how this new swimming pool water/human mixture thing works out.
Seriously... if law suits were an issue, imagine the crackpot that would sue because their child, while not prohibited from swimming underwater, was prohibited from
breathing underwater, and thus drowned.