A favorite phrase is if they look that close they deserve to find something.
Fast does not imply quality.
Doing something by hand takes time behind a tool… folks like Chris Schwarz and Rob Cosman can knock out hand cut dovetails very quickly and precisely … even after the course I cannot … I just never did the 30 consecutive days of dovetails.
For me with 10 larges slots and 12 smaller ones the CNC just seems more effective than the by hand approach.
And I agree “The key of course is learning which is which”
I thought about using it to square up some boards that are a little off. These are usually 24x24 range and hard (for me) to get the first straight line on boards this large on the table saw. Smaller boards I have a jig.