Because guns are simply just plentiful and easy to get, and too many apologetics keep allowing them to be plentiful.

You seem to be close to a moment of understanding here but not quite getting it. You seem to recognize that there are other tools available to affect such disastrous outcomes we'd be doing nothing to address, but to also pretend that there's no indication nor chance anyone would use any of these other tools.

You seem to recognize the futility of the whack-a-mole game while recognizing its existence.

Yes it doesn’t fix society’s underlying issues but that is a MUCH harder problem to solve than simply getting rid of (as many) guns (as possible), or at least not just allow so mamy people to own them willy nilly.

It really isn't. How much effort do you believe will be required to bring about an amendment to the constitution of the United States?

How much less effort will be required to bring about simple legislative changes? By simple comparison of the two vectors of change, one of them is unquestionably easier than the other. Spoiler: It isn't undoing the 2nd amendment.

Interestingly enough, you seem to double-down on the previous recognition the problem - pressures toward mass violence - would be left unaddressed but with the vast majority of options for mass harm still very much present and ignored.

The goal is to drastically reduce the number of innocent lives being taken ASAP, not to argue about weapons or social ills or all of this other nonsense.

Which is more effective: A change which is quite impossible to bring about, or a change which can be brought about with some difficulty and compromise?

Which is more effective: A change which removes one of unbounded options to bring about a given end, or a change which reduces the count of people seeking to bring about a given end with any tool available?

We both know you know the answer.