I can understand your fellow debater getting frustrated here. Whilst at times you each seemed to be confused about what the other is asserting (i.e., international flights vs domestic flights), at other times you are asserting things that are generally known to be incorrect.

Complementary alcohol - as a standard offering - is not normally offered to basic economy passengers on domestic flights in the U.S., and hasn't been for at least a couple of decades.

That said, some airlines offer it as a promotion on some flights [1], which may be why you have experienced it. But it's not a norm that any coach passenger could expect on any domestic flight, the way it used to be in the earlier days of commercial air travel.

The video you shared of hot towels being handed out in economy on a domestic U.S. flight was a one-off promotional event. It's also not the norm.

Like I said, I get that the two of you were talking about different things and were sometimes confused about what the other was talking about. But you did inflame things by asserting/suggesting things that aren't really the case.

[1] https://www.globaltravelerusa.com/american-airlines-to-offer...