NBA/NHL teams, however, don't play only on the weekend. When they travel from one coast to the other, it's part of a 3-4 game swing. Can't do that with footballNBA/NHL clubs routinely travel similar amounts (not that the Saudi clubs will be in a super league, the Saudis will just be financially invested in it).
It's all about money. Free market capitalism tends to concentrate assets into smaller and smaller circles. It's been the inevitable end state for football since the first advertising board went up. You could argue, it became inevitable the day players became professionals.