First, this is the internet and the cream of the human race doesn't live here - but the dregs do. It will help to have a thick skin.
Second, while you've got the punctuation skills - and you use them - but you could use a little help with paragraphs. Not only does it make reading your work more easy, but it will demonstrate that you have a logical and orderly mindset - that is, it makes your post look like it's worth reading.
Now onto the meat of your post:
There is a thing called Material Creep - and, No, that's not the name of a Marvel villain. It's where structural members elongate over time. Saggy springs are a good example.
Wikipedia: Creep (deformation)
So it's quite possible for a vehicle to go out of alignment over time even if there was no accident or even excessive stress. Well designed structures shouldn't deform much over time, but that is not the world we live in. Not only are mistakes made, but sometimes there are unknown issues - such as the Tacoma Narrows Bridge problem.
Wikipedia: Tacoma Narrows Bridge (1940)
So if you'll cut us some slack, we'll do the same. (Well, at least some of us will!)