That is all very compelling, and if I were a posek would likely rule in accordance with the logic you just outlined. Nevertheless, the Gedolim of today and the previous generation evidentally feel that it is wrong and shouldn’t be done, if not an actual issur. This was demonstrated by the sourced post previously made on this thread.
You made a similar observation, if I recall correctly, on the worms in fish discussion, when you indicated you felt Rav Belsky’s logic more compelling but nevertheless against the ruling of the majority of gedolim. And you included Rav Heinneman as against, since he recommended not to eat it – even though he didn’t specifically state it was an actual issur.
Here I am stating simply the majority Gedolim of today and yesterday who’ve directly commented on shaving (rather than using our own interpretations to determine their position on the issue), are against it for whatever reason. Rav Kanievsky, to use as an example, was very clear on this, as sourced by a previous poster much earlier on the thread.