"I would love to get to the point where I can tag my mooring ball without power but I am not there yet. "
In my first sailing lessons, in Solings, we tagged the mooring ball perfectly at the end of the first day, first time. So the instructor says ok, that was too easy, let it go and let's do it again. I think "again" took a good half hour to happen.
An engine is like an attack dog. As long as it obeys perfectly, it can be a very good thing to have around.
I love it when everything just works out right, but it is that consistency that I worry about.