I find that while home practice consigns mistakes to your muscle memory too, what you certainly learn with time is an instinct for safety, accidents turn into near-accidents
I find cutting speed is often not the limiting factor at home after a while.
Getting stuff from and off the board/into the mise in a controlled manner is a far more insidious time sink (that might include getting some spice from a can which involves finding it empty which involves getting a refill which you have to find by rummaging through a box on an overhead shelf after making space on a crowded counter to put that box which involves getting rid of the cut-off pile which involves dealing with a full-again-the-second-time-today garbage can which involves a couple handwashing steps which involve finding that all the towels are wet again which involves getting fresh towels ... such scenarios happen to me every 10th ingredient, and i tend to use 11 or more
And if you're like me and only really building the recipe while building the mise, thinking time adds up... I guess it's these areas where the professionals will always have advantages from the way a commercial kitchen is setup (they're not trying to be able to do everything ever possible in a ~7 square metre (gross) kitchen), and from experience...
And: If you want to cut fast, time to get out the big board so you can afford not to care where the cut stuff falls until done cutting.