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Not at all. Just pointing out that all three are swimming in the same waters - at least from a career point of view.  As has been pointed out Sabrina and Chappell released a collaboration just a few weeks back.   Nothing wrong with preferring one to another of course - or liking all three of them 

Few factors to consider though alongside this. Since Green Day played both Nos Alive (then Optimus) and Rock Werchter in 2013, they haven't played in Portugal at all. Whereas they have played Belgium 3 times (including next year's Werchter) and more surrounding countries a lot more frequently so the demand their has been easier to satisfy

it’s always mind blowing to me how many people don’t want to do a trial run at a smaller festival, let alone people who have never been camping before, and want to dive in at the deep end!

This 👆  That 👆👆 A collaborator, effectively a producer, not a writer. Chappell had most of her songs in this album done before she met him. If you're giving him all the credit, then I hereby give the National, Bon Iver and Jack Antonoff all the credit for making Taylor the biggest artist on the planet.

Yep, but she's got individuality to her writing. Soooooooo that.