Fine, but lets call a spade a spade and admit that the ability to play like that is so far below easy mode that it needs creations of new words in English just to properly express how easy it is.
And that not being able to do it is not "insanity mode". Rather, it's sanity.
I completely agree sanity is a relative term (ask any insane person and they'll tell you they are perfectly sane and everyone else is nuts. One of the first indicators actually.) but there comes a point where insanity becomes absolute, GT insanity mode is just that. It isn't tough, it isn't challenging. It is a pointless and tedious grind that adds little game play value other than to delay the inevitable. If I wanted that I would play a realistic simulation game where one cannot simply punch down a tree with their fists should they do choose.
Remember the distinction, you may find it sane but the vast majority of players would not. I can deal with it, I choose not to. I've seen many people try the Mindcrack pack as their first experience with mods and they are put off because of the seemingly impossible wall of rubbish that comes with crafting simple things. Not all of it is due to GT but a lot of dissuasion I have seen comes as a result of it.
Usually the sensible option is to set things at normal levels and let people scale up as they choose. You don't set the goalpost high and force people to scale down. progress goes upwards, not forced downwards.
This discussion has been done to death, I'm not going to repeat it again, for the sake of my sanity and that of everyone else XD