I think it's also different how much of a show it is. If your concert is mostly just you with a guitar and a mic, then it's easy to just load that up and stay somewhere for as long as needed, and it's easier to find smaller venues where you can play a week of shows.
If you're Taylor Swift or the like, you're playing 30k person stadiums and have a stage setup that takes most of a full day or two to set up and tear down. You likely have to book the venue years in advance, and the logistics of getting you, your 30 backup musicians and dancers, all your stage tech, and god knows what else around the world is the sort of thing that's not really amenable to just adjusting on the fly.
Once you're big enough that you're competing with like... international sports events and entire music festivals for space, you're just working in a different world of constraints. In some ways, it's similar to scalability in computing. If your personal website or side project blows up, it's easy to find the space to double or even 10x the resources. If you're Netflix and somehow you double your demand, there may not even be available resources in the world to help you, and you can't just fall back to doing something smaller by choice.
If you're Taylor Swift or the like, you're playing 30k person stadiums and have a stage setup that takes most of a full day or two to set up and tear down. You likely have to book the venue years in advance, and the logistics of getting you, your 30 backup musicians and dancers, all your stage tech, and god knows what else around the world is the sort of thing that's not really amenable to just adjusting on the fly.
Once you're big enough that you're competing with like... international sports events and entire music festivals for space, you're just working in a different world of constraints. In some ways, it's similar to scalability in computing. If your personal website or side project blows up, it's easy to find the space to double or even 10x the resources. If you're Netflix and somehow you double your demand, there may not even be available resources in the world to help you, and you can't just fall back to doing something smaller by choice.