Interesting couple of posts Andre, do you really love flying?
From those posts it really does not seem that way. You appear to be very focussed on potential risks and trying to avoid them. The easiest way would be not to learn! Then you pick a comparatively obscure way of learning (TMG) and then try and find fault with it.
None of the GAA type accident statistics are particularly accurate - the collection and small sample size mean large levels of variability depending which countries, types etc are being looked at.
Then you agonise over turbulence and the aircraft being moved by it. That sounds like a lot of sailors I know who own perfectly good yachts but never sail them in less than perfect conditions. They make great floating caravans!
Either you want to fly enough to make you accept the risks - or you do not. As you have already worked out the largest single variant is the pilot. As you are not yet one then your life is for the moment in the hands of your instructor - a point not yet made in your posts but s you can see from the responses they vary quite a lot as well!
In short either you really do love flying and then turbulence and differing aircraft are comparatively unimportant or your concern is so great that logic cannot overcome it.