Poor hygiene is often there in autistic individuals because they do find it difficult. I have to even shower in small steps, to where I can't even wash my hair and body in the same showering session.
I think your post is rather offensive to those who have trouble with hygiene for either sensory issues (maybe they can't tolerate toothpaste as an example), organization and executive functioning (planning it, doing things in steps, not getting overwhelmed), and simply getting wrapped up in other things where such functions go unnoticed.
Every task to me is a vast amount of steps and hygiene is something that can consume a large amount of time and is often very uncomfortable. Personally, I've never been accused of having bad breath since childhood and I don't stink. But that is me. Your experience isn't everyone's.