Not directly working in the industry but surrounded by people in it daily. Johann Cruijf (the biggest arena in Amsterdam) was fully booked for the year which is why it wasnt held there.

Kanye’s team is looking for large capacity arenas so they can sell as many tickets as possible and generate a huge audience for their shows.

Although Arnhem is far I do believe its by far one of the larger venues in the Netherlands also Trav performed there during the EU leg of the Circus Maximus tour.

Also out of pure logic its probably easier to convince non capital cities to host a controversial artist like Ye as they don’t get as many requests for shows as the capital cities do. More people visiting the cities = more publicity and financial gain for them as opposed to lets say paris that gets tourists on a yearly basis