I think we are in agreement? Yeah, everyone goes for different reasons.Everyone goes for different reasons: shake off the rust, prove to themselves/a few friends they can do it, network, entertain the crowd, etc.
Many of those entertaining people is the least concern. That was often way down on my list when I did it. Not %%^^ing up was at the top of the list.
The problem is most basement bands get together once or twice and expect to GIG twice a month with a handful of songs and no, I mean zero, clue what it takes to get there and get your crap set up....assuming you even have a place to gig.
I guess my question is this: Why play in front of other people if you aren't concerned about whether they enjoy it, or are entertained? Doesn't it then become only about the person doing the playing? If it is only about the person playing, then why is a public performance even necessary?