It seems you're getting confused by the big words so let me put this more bluntly for you:
those other developers let you run your events in peace because they need you as much as you need them. Smash sells to a different audience to the tune of 5 times what most would arguably call the second biggest name in the scene pulls in. If you believe for a second that those other companies would continue to let you run your events the moment that arrangement changes in their favor or if you step out of line from the
boundaries they have set, I have a bridge to sell you. Sorry to be the one to break it to you, but Nintendo isn't going to get any less
litigious about this; so your options are pretty limited here. Fortunately enough, it seems you've made up your mind to impotently scream into the void about this instead of doing anything to actually improve your situation, so look forward to two more decades of Lucy pulling the football out from you, Charlie Brown!