I don't mind carbide tools being slower.
I's a hobby for me, and I enjoy every stage.
For me speed isn't the most important factor.
I don't necessarily want the turning to be over in a few seconds. I want to enjoy what I'm making.
I think that 'each to their own' applies very well here.
While I'm new at pen turning, I make my living making things with my hands.
In leatherworking, for example, there is often the same argument about traditional tools V newer tools and techniques.
The key thing, in my humble opinion, is that if the tool can be used safely and gets you the result you want... it's the right tool.