some manual dexterity is learned, like typing or playing the piano. I can still change gear in a car though I've had an automatic for 20 years, because that's the way I learned. But I wouldn't swear that inability to do these things necessarily means there's something wrong with you. People with acute spatial awareness make better footballers than people without, but just because some are very good at it doesn't mean others are somehow failing.
My own guess is that all sorts of abilities fall onto a spectrum, with some people good at them, some less so. Whether it's a "problem" is entirely down to the individual. Ten-finger typing has stood me in good stead over the years but I can't play video games or pianos. As I don't want to, it isn't a problem.
I can see slow writing/typing could be a problem for you. But how's your talking, for instance? Is it the case that your tongue works at "normal" speed even if your fingers can't?
As to whether this is all dyslexia, I don't know. Illnesses are what doctors say they are. Maybe they don't consider poor coordination a symptom; but then again, maybe they'll change their minds next week. At the moment, it might be interesting to know that X% of people share a lot fo your symptoms and Y% don't. But my overall advice (which you probably know perfectly well already, of course) would just be to see what you can do about the things you consider problems and not bother about the rest.
Looking back on this, I can see I haven't actually said anything very helpful at all. Sorry.