It is more than my opinion, it is literally the academic concensus on the subject, including pro-capitalist economic theorists in the consensus. You’d literally have to go back to the divine right of kings being an intellectual position taken seriously to find a consensus in support of rentierism.
Now, of course, feel free to be an anti-intellectual about it. Your opinion as someone who hasn’t read a lot of political economic theory is just as valid as the mainstream academic concensus among economicists and political economicists.