> wildly illegal to use

There's no law with any teeth at that level. Who's going to enforce it?

Of course the ICC might issue arrest warrants for US leaders, just as they have for Netanyahu, but the practical implication of that is mostly that ICC members will be subject to attacks of all kinds.

> Imagine if Putin was using those on Ukraine civilians but US uses them no problem?

Since neither of those things are true, what do you think this unlikely thought experiment might tell us?