I'm worried, it's not like I don't care. For example, I'm worried that Google is such a huge ginormous target, that at some point their Gmail will be broken. At the same time, there are benefits to sharing data. There are benefits to me, in Google using the information it has on my, to make my life easier. In this case, I judge that Gemini using my data to train, is a low extra risk for me. Compared to all other risks I take, for doing things in public. Including writing this on public forums, as you do too.

In general, I find the ongoing public scare about sharing data, to be anti-thesis to the original spirit of the Net, that was all about sharing data. Originally, we were delighted to connect to perfect strangers on the other side of the world. That we would never have gotten to communicate with otherwise. I accept there might have been an element of self-selection there, that aided that view: people one'd communicate with, although maybe from a different culture, would be from similar niche sub-culture of people messing with computers and looking forward to communication, having a favourable view of that.