What are you on? The very first stop on their tour is at Amale ARENA in Tampa, FL. The rest of the tour is all arenas including one of the best...Madison square garden.
So now you don't know the difference between arenas, stadiums, and amphiteaters/pavilions.
Saying a stadium would be 5/6 empty was maybe an exaggeration (depends on the size of the stadium, but usually they're about 40-50k plus). But 1/2 to 3/4 empty? Definitely. I think Rush is probably averaging around 12-20k per concert these days.
And to the guy who brought up Pearl Jam, that's the exact OPPOSITE extreme, so of course it would make a lot of people unhappy as well. But I'm sure a ton of people were thrilled. I mean, really? Did you just go to see Jeremy and Daughter? BORING.
And I like the Stan Lee comment as well. But to me, that means you throw EVERYTHING into the setlist. So for Rush that would mean some of their super early hard rock stuff (maybe something BESIDES Working Man now and then), some stuff from the mid/late 70s where they were finding their sound (FBN through PW basically), then of course a good handful or so of their hits (PW through TFE basically), and a small smattering of new stuff (VT through CWA). THAT'S how you give people an overall introduction to Rush in 2 hours. I mean, if you don't play "obscure" stuff because it's obscure, guess what? IT STAYS OBSCURE! But Rush doesn't have any "obscure" stuff anyway, as I mentioned before. I think in their entire 40 year career, I'm not aware of a SINGLE b-side of theirs. I've heard rumours of a couple of unreleased demo type things, but let's assume if they didn't release it, they're not going to play it live. So everything except maybe the last 3 was released on a record that went AT LEAST gold.
Rush is actually in a unique position that way. No other band could literally play ANY song from their first 30 years and have like half or more of the audience know it. So why are they so risk averse to playing songs they haven't played in a while? I mean, ok, if they play I Think I'm Going Bald, it might not go over GREAT. But literally anything else from CoS and a huge chunk of the crowd would go apepoopie, and guess what, those people would remember that and talk about it for years to come. They ALWAYS play Subdivisions, but how about New World Man or Losing It or Countdown? I think Signals must be at least Platinum, so AT LEAST a million people know those songs! They're not rare or obscure, they're just rarely if ever played.
So that's why so many Rush fans are so disappointed that the setlists don't get scrambled up a bit more.