You would surprised at how many people get a total mental overload when they start flying. Some people take to it like a duck to water and cope very very well and have no problems, like yourself CT.
I know of someone who was killed doing a touch and go and was a very low houred PPLer. The error that was made (whether it was pilot error or mechanical, I do not know) was that the flap was not retracted for take-off and in my opinion, if a touch and go was not performed in this instance, the tragedy could have been avoided.
So, when it comes to PPL students (early on in the PPL), I say they are a no-no, but once they demonstrate they can do a touch and go without any major hassles, then lift the ban on them...but that is only my own opinion.