Hello Frankhe
Firstly, welcome to the SBB Community.
We are a customer support page run by volunteers, we are not the SBB customer service.
E-tickets are personalised to avoid abuse or falsification. The name and date of birth are being verified by the ticket inspectors upon ticket check. And, this is not an SBB invention; all train e-tickets in Europe are personalised.
https://sbb-tickets.cc/en/help-and-contact/products-services/tickets/switzerland/tickets.html
This is not the case with tickets from the machine, where tickets are printed on special paper. There is no issue; if you do not want to declare your data, simply use the machine or get it at the station’s ticket office.
Kind regards,
Roland