I would actually prefer this tbh. I setup my sim card for a new mobile plan from their app instantly. I couldn't do that with sim and would have to wait for them to ship. Unless you swap phones often, it's pretty much a lot better.
That's your opinion, but if you had a previous phone, you'd just swap the SIM card into the new device. While I personally disagree with your opinion, I understand your points.
Now you will just do it electronically. This really isn't as big of a deal as I am seeing in the comments. You will just move them across devices. This already works on iPhones. When you move from an eSIM on a 13 to a 14 for example. It will be similar on Android. On top of that, security wise, this is an absolute win for the average consumer, albeit annoying for Lemmy users that can't bother to learn a thing or two about why.
Not every phone I have supports esim. If my phone breaks for some reason, or something software wise happens to it and I don't have the time to deal with it at the moment. I can pop out my sim card and put it into another phone to get it working so I have something at the moment rather than nothing. The example I've provided has actually happened to me before and I'd be screwed if I had an eSIM instead.