I am sorry to hear about your past, but that still does not mean that you know enough about structural engineering or construction to criticize those who have pointed out the obvious dangers of putting a 12 ton weight in the center of a thin concrete slab.
Believe it or not, more people in North America (USA and Canada) live in houses with basement foundations than in houses with slab foundations. Therefore, it is not uncommon that some people would think about the dangers associated with a basement foundation.
For your information, Basements prevent foundation shifting due to freeze/thaw cycles in colder climates, and maximize square footage without unnecesarily adding height to walls that will be exposed to colder weather that will require insulation (because the walls are buried and not exposed)
So before you belittle those who know more than you about construction, why don't you keep your unintelligent comments to yourself. You do nobody any good. These people have probably forgotten more than you know. I hope one day that you do something stupid and it goes wrong because you are too close-minded to listen to anyone else.