It's not that simple. If you keep having the squits for long enough, or can't keep any water down (especially if the weather is hot), you can get dehydrated even as a nominally healthy adult and need an ambulance. Mostly, it's as you say, but if you are on your own and can't stand up and/or your pee is getting dark, then I think it's entirely forgiveable to call for help, even for 'just the squits'.