I have a "biased" opinion given that I have sold hundreds of the "original" carbide tools that I developed and have custom manufactured. Carbide tools win hands down if you would rather spend time turning as opposed to "wasting" time sharpening HSS tools.
While I appreciate your opinion, sharpening HSS tools is not a 'waste' of time. I use carbide every day as a machinist. Great for metal. But for me, and my opinion, they are not as good for wood. As has been said, by Hank, the carbides do not have the same sharp edge as HSS. They are designed for metal, and the 'dull' is designed to resist heat that turning metal makes. A sharp edge allows heat to build up and wears down quickly. There are some finer edges being made that will improve the woodworking application. Using a diamond hone on them for woodworking will eventually get that edge. I use 99% HSS, and have a carbide tool I have used, but it is not my preffered 'weapon'
That all said, as a machinist I am pretty annul about things, and sharpening was no different. I used to fret over it, until I read an article by Richard Raffin. He used to fret as well, and decided that he wanted to spend more time turning and less sharpening, so he got a basic bench grinder and kept it close by. When the tool got dull, he swung over and touched it up, and got back to turning. As long as the relief angle remains reasonably close to original, you will be fine. Good HSS makes a difference as well.
Anyway, it is as you see, to each his own.