No I agree with you, a gentle but firm push away is more than fair. I don't have roosters, I have ducks, and I use physical communication regularly. positive, and as reminders. They were hatched and raised by myself, so they are very confident with me. They are never aggressive, but sometimes if they get too excited, they may mouth/nibble at my hands a little too rough, and I would gently cup a hand around their bill and tell them to be "gentle" (very loosely, they can move away and open their beaks, just without hurting me!) and instantly they would calm and continue "grooming" me very gently- at which point I would reward them. I am very gentle with my birds, and am never upset with them- honestly I've been blessed with extremely affectionate ducks! But contact is definitely not a bad thing, as you say, they use it with eachother to communicate. A nudge with a hand, or foot, fine, I accept that's reasonable
Often though sadly when I hear of folks disciplining roosters, they are inflicting fear/pain- which I definitely find unreasonable. Kicking "across" the coop, or yard, is with a fair amount of force- which is where I take issue!
Anyway, I do agree with you- you sound pretty fair!