eSIMS are typical Apple BS. There is nothing easier than switching a physical SIM. In the past people often asked someone else to use his phone if their own battery was empty. All they had to do is putting their SIM into the other phone. That seems much easier than any electronic way. If you remove your the physical SIM, you no longer have to fear that the other person - who sometimes was a stranger - will accidentally or intentionally continue calling other people from your number at your cost. How does removing work with an eSIM? Do I have to trust the other person that he removes my eSIM from his phone?
And without a physical SIM, how can I prove that the number is mine? There is mo easier prove than owning the SIM.
For privacy reasons I often order prepaid SIMs from the UK for services or apps that require a phone number. I do not like to give away my private phone number to Tinder, WhatsApp, Twitte or even Apple. Those prepaid numbers are available for just about 2 Euros including shipping. I just put them into my phone and it works. I do not want any kind of identification process just to claim my eSIM.