ARM could simply not have established itself as dominate if they would try to capture all that value, when there were competitors who wouldn't demand even more.

ARM could simply not have established itself as dominate if they would try to capture all that value, when there were competitors who wouldn't demand even more. If ARM makes the 'mobile phone' ecosystem possible, ARM should get money from each call? How would you even capture that. Not even the company who produces the phones gets that money. ARM already gets royalties on each chip sold.