I don't doubt the OP's complaint either, but let's rewind.

I took the OP's primary complaint to be that there was no butter available with the cheese plate, not that the F/A had an attitude about it. But maybe I misinterpreted.

My ONLY point was that catering provisioning decisions are not made by F/As. If the service standards are that cheese plates do not have butter pats (which I believe is the case but am happy to be corrected), and there are no extra butter pats provisioned in case someone wants one, that is not the F/A's fault.

Of course if the F/A was rude about it, that is not acceptable - which should be obvious - and I did not mean to suggest otherwise.