Wandering Nightmare

I am surely not an authority on this matter, but I would have thought that the alignment numbers will vary pending the load on the front wheels. One person's motor home could be front-heavy pushing the front tires up inside the wheel wells. Another person's motor home could be rear-heavy which would bring the front tires out from inside the wheel wells. That would change such numbers dramatically. I wonder if all this alignment "number talk" is dangerous talk.

I am surely not trying to offend anyone here. If my thoughts are wrong, please explain it so I can understand this better.....in layman terms please.