Another control theorist here. I strongly disagree with your premise of rigor in control. The whole field is ripe with math snobbery and virtually plotted its own funeral to the point of absurdity.
The field's key contribution is in the ideas and the insights it can provide otherwise extremely laborious to obtain. Definitely not in senseless dry exposition of unnecessarily general theorem proof parroting.
The field's key contribution is in the ideas and the insights it can provide otherwise extremely laborious to obtain. Definitely not in senseless dry exposition of unnecessarily general theorem proof parroting.