The average time a viewer is willing to look at your photos is 4 seconds per image with a maximum of 15 images. Choose wisely what you want to show. Kill your precious darlings.
Over the years those not so great negatives that you propose killing might begin to show history. It could take 5 years or 20 years or more. “Oh look there’s the old store they tore down.” Or “that’s the intersection before they put the traffic light up.” At the time these photos were taken these negatives may have been tossed by your rule of only keeping the best. But to some in the future they still have some history to show (if only local history, which I love). Just a thought…
It's again up to the medium. Digital has that infinite replication but non physicality whereas film has the physical negatives. IMO, and as I wrote earlier, having the negs by default in film just allows having this physical backup. Which may end up lasting or not in one way or other.
Personally am an outlier, I had a fascination for the family archive early on due to late relatives which were documented in very few pictures. Again slides are the most interesting but the negatives are just folded in the classical minilab envelopes and are there... It was nice that I could go back to a couple of dad's old BW negs and print photos from 1972 which were very appreciated to be seen as larger prints. Also, I had a fascination for archival keeping early on, but nowadays am not so well organized...
One possible strength of film is that it goes against the short attention span and attention economy trend. I have met people that explicitely appreciate the slower workflow.
Funnily I am currently sitting on a batch of unscanned negatives. Also, I usually had been very selective on shooting due to the film expense as some mention, so my negatives are usually already very select. Been a happier shooter the last years so have generated more.