Many suggestions of improvement

[Lipomo]

to make more precise cuts losslessly.

So, you are creating an intermediate file.
For my taste, fps*10 is way too large of a gap for precise cutting, but I suspect you are probably not really doing a lossless cut (only cut on IDR frames).
I suspect that you use some software which does some smart-re-encoding of the split gops.

Cu Selur

Most of time it's just a precaution, for example when I make projects where I edit videos, I can delete the source, and still change my mind and adjust the editing losslessly, or also in cases where I want to keep some scenes of a video in addition to the source.
I also find that fps*10 is large for precise cutting, thankfully it's generally good enough in those cases.

Actually I don't do smart cut (except in some cases). I mainly use softwares that allow true lossless cut on IDR frames.