Yes, I absolutely would. I think a better question is would I want other people to use a bread slicer that chopped my fingers off on average less than they did

Yes, I absolutely would. I think a better question is would I want other people to use a bread slicer that chopped my fingers off on average less than they did with a manual version. You might think more highly of your own abilities, but raising the average is worthwhile even if not perfect.