Supercomputers used to be giant machines we had in giant warehouses... Now the phone in your pocket has the computing power of the 1980s walking around with you. Assuming your super intelligence will always be huge is... well not a great assumption.

Also superintelligence doesn't need a body itself. It just needs yours. Putin for example has commanded hundreds of thousands of dumbasses to go get themselves killed in Ukraine. In this case does it matter if Putin is flesh and blood, or a processor that lists out commands for others to follow as long as they are willing to listen?