You're not allowed to "broadcast" (with a few exceptions) or play music with an Amateur licence.

I think the suggestion is to use AREDN for our backhaul from the station to the transmit site instead of 802.11ah. So it wouldn't be for broadcast per se, but I am still skeptical that is an allowed use for AREDN.

one-way communication is prohibited (with a few exceptions):

https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D...

I'm not sure what's on the amateur radio exam these days, but when I got my Extra back in 1977 this was definitely covered.