There is a weird behavior here, where if the string passed by the user in is not a valid boolean, it's interpreted as false by ParseBool. I'm just copying the existing behavior from where I extracted this logic, but let me know if we should instead return true, our default if uninformed.

I'd argue validation should be placed elsewhere, perhaps as an enum, but I think it'd be best to just make this a bool and avoid all of these shenanigans #455 :-)