The thing is that if they cheap out on one area then you have to think "what else did they skimp on?" Like if they're that careless about what you can see you should be terrified of what you can't.

And it'd be one thing if we were all just laughing at some tech bro fulfilling his wacky dream and using some odd parts, its a totally different conversation now that we know the sub imploded. The guy probably cut every corner possible and if those people with him had said "hey, this sub uses shitty consumer grade parts, I'm out" they would be alive still.