I believe that most craft-like skills can learned and mastered through effort and practice over time. But as a part-time woodworker, I don't have the time to concentrate on getting really good at everything. So I compensate. I pick and choose what I think is important and/or enjoyable and concentrate on those things. For the remainder, I find work-arounds. Maybe I use a specialized tool, or a power tool or even buy a pre-made component.
For example, I do rough dimensioning with power saw, jointer and planer. It's fast, accurate and familiar. This allows me to spend my limited time using hand tools on joinery, fitting smoothing and some shaping. The router plane is a little bit of both for me. It's a tool for automation but not a power tool. In fact, I'll be using it primarily to cleanup after power tool work.
Money is also a limiting factor. These tools are not an investment for me, the are an expense. I'm fairly new to hand tools and so I only have a small (but growing) number of tools to choose from. Sawing to the line is a nice idea but first and foremost, one must have the saw, then learn how to use it and finally, saw to the line of a tenon.
I think some thought should be given to woodworking goals. My main goal is to make things from wood, furniture mostly, as a hobby. I'm not a tool collector, I don't rehab tools unless I have to, and I have no goal to work exclusively with hand tools. I've made the choice to incorporate hand tools because they work better in many cases than the powered alternative and I enjoy the quiet intimacy they foster.
On this note, I'm making tables and these tables have mortises. Above all else, I want clean well fit joints so that my tables are strong and attractive. That priority affects my other decisions, like chisel and saw vs stacked dado and router plane.
-- Dan Rode
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle