I think thats the wrong way to look at it....there are clearly thousands of people who want to see those acts....but at the same time there are thousands more who would rather be elsewhere at the festival.
The people who complain about the state of the headliners (usually people who dont go and/or have never been) should really experience the stuff you dont see on TV.
Not everyones cup of tea, but when Foo Fighters were headlining in 2017...i was in the pit at The Truth stage watching the Dead Kennedys....when Ed Sheeran was doing his thing we were banging it out to Groove Armada at Arcadia...
This is (was) arcadia...
Check out the running times of the last few years and you'll see just how much is (officially) going on at the same time...
Glastonbury Festival of Contemporary Performing Arts
www.glastonburyfestivals.co.uk
Glastonbury Festival of Contemporary Performing Arts
www.glastonburyfestivals.co.uk
Glastonbury Festival of Contemporary Performing Arts
www.glastonburyfestivals.co.uk