So you advocate umpires guessing then? The simple rule as an umpire is that you only pay what you see, not what you think may have happened? The key word you use is assumed and that is what makes it a terrible decision, he assumed it was touched based on a sound, not what he saw. A good umpire would have called play on because a good umpire would not assume.He heard the hand slap the boot, assumed it was touched and blew his whistle. Often sound is as valuable as deflections etc in situations like that, otherwise you would never see touched off the boot paid.
I'm not saying it's correct but I can see why it was called touched, and if Adams kicks the goal (which he should have) then it's a non issue.