I can understand why one person might want to gig and another might not. This is just one more thing where there's no one size fits all.
Gigging can conflict with a dayjob, personal relationship or other responsibilities. And bottom line, everyone is not cut out to gig. There's a skill level needed (which obviously varies from gig to gig) and probably just as important an attitude that needs to be intact.
It can be liberating, a royal pain in the ass, exciting, boring, lucrative, financially draining, it's wide open as far as the results you can achieve. You can put your all into it and work with others who make you feel like you're just banging your head against the proverbial wall, you can have a chance meeting and magic happens on stage.
Here are a couple of real world gigging scenarios:
I had a guy ask me about subbing with his band. He lives on the other side of the metro area I live in. A weekend night, probably has some non-standard songs to learn, wants to have a rehearsal...
for a $100 gig.
Now this might make sense if I were an ongoing member of the band with a common goal we're working towards but in this case it's likely a one shot thing. So a quick calculation tells me in addition to at least five hours of driving, six hours at the gig, 3 or more at a rehearsal, a couple of hours at home practicing before rehearsal, around $30 for fuel, never mind wear and tear on the vehicle...
I'd save money by staying home. Less than $5/hr BEFORE taxes doesn't sound all that appealing. And I know folks who do this regularly and some people envy them.
Or get a call to sub with a special events band, no rehearsals, pretty standard setlist, two hours driving, four hours on site, casual wear, less than $20 gas, $500.
I'd be the same guy on either of these gigs. Some people gig for enjoyment, at this point that's a luxury for me. If I'm playing I need to maximize my time. But I can understand people who don't have to do that. Trouble is, those people don't understand me and think I'm gouging when I state my fee. Sometimes I explain how things work, others I just leave them to their own devices. You sometime do get what you pay for.
There are all sorts of scenarios for gigging and for some folks none of them work. I can easily understand that. It's all about your big picture.
It can be and often is a crapshoot. Knowing all of this (and I doubt much of this is news for many folks) yet not being able to see why one wouldn't pursue it... now that really doesn't make sense. IMO of course.