What is a "fringe use case" to you is an every day issue for someone else.
Inability to move your service from one phone to another via the simple act of moving a card from one phone to another, which takes all of 30 seconds or less, is a HUGE benefit to a lot of people.
Hell, it took me 11 days to get my Verizon service moved from a SIM card to an eSIM, so I could use it with my new phone. It involves multiple visits to Verizon offices and emails. Physical SIM swap? Seconds.
Then of course suppose you, like me, kill your phone. Damaged. Destroyed. Doesn't freaking work.....I could take the physical card out of it and move it to ANY phone I could quickly get. The eSIM? Yeah...didn't even bother trying to deal with that line.
But no...maybe you're right...because it didn't happen to you, it just doesn't matter.