Chaosmancer
Legend
First, by making Hiding dependent on the presence of absence of a condition, it is inherently binary. If you're going to houserule at your table that it's possible to both have the Invisible condition and not have the Invisible condition at the same time, great. But if you plan to make a change that big, I don't understand why you are happy with the rules in the book.
Second, if you're playing at a table where (1) the invisible condition is binary, and (2) the DM insists that neither you or your allies can immediately tell whether or not you actually have the Invisible condition, then, in such a world, verifying whether or not the hiding character has the Invisible condition before trying to use it in a noncombat situation would not only be perfectly reasonable, it would be a basic precaution before embarking on something dangerous. (And obviously one wouldn't use a damaging cantrip. One would either use a non-damaging cantrip that requires sight--if 5e 2024 has any--or some other ability that requires a visible target.) Is trying to use character abilities to test whether or not someone is invisible ridiculous? Yes. But it's no more ridiculous than the combination of conditions (1) and (2) that would make it necessary.
No, it is absolutely more ridiculous. Because if you wanted to take this to that level of binary extreme, then hiding is utterly impossible because Gods exist in DnD, and can perceive you. The fact that the book only talks about the situation from a 1v1 perspective says nothing at all about how that operates at other extremes.