You're correct, you can say whatever you want on MacRumors as long as the posts don't break the rules. And when they do...
How do you break the rules of MacRumors when talking about a billionaire or oligarch and people who worship them in general?
A Tesla phone would have many fans and give I believe, give the iphone and android a run for their money.
It would be a repackaged Android phone at best. Developing a new OS with developer support in this era takes years and years and by the time you release it you will be miles and miles behind where Apple and Google will be at that time of release.