You underestimate how much patents are used to impede competition - see https://arstechnica.com/information-technology/2017/06/intel-fires-warning-shots-at-micr

You underestimate how much patents are used to impede competition - see https://arstechnica.com/information-technology/2017/06/intel-fires-warning-shots-at-microsoft-claims-x86-emulation-is-a-patent-minefield/ https://arstechnica.com/information-technology/2017/06/intel... , and the many less public patent licenses and threats.