> Imagine if your access to Reddit, Twitter, HN was tied to your computer, because that's essentially what you're advocating for.

You have missed the point. OP is talking about how ridiculous having a physical bit of plastic to log in to the cell towers is. The physical sim provides next to no value.

And it comes at a heavy cost in space inside the phone as well as annoyance waiting for a new sim to ship in the mail. While esim providers email you a QR code and you are good to go immediately.