A common intention with opensource is to allow people, and AI tools they use, to reuse, recombine, etc. OSS code in any way they see fit. If that's not what you want, don't open source your work. It's not stealing if you gave it away and effectively told people "do whatever you want". Which is one way licenses such as the MIT license are often characterized.
It's very hard to prevent specific types of usage (like feeding code to an LLM) without throwing out the baby with the bathwater and also preventing all sorts of other valid usages. AGPLv3, which is what antirez and Redis use goes to far IMHO and still doesn't quite get the job done. It doesn't forbid people (or tools) to "look" at the code which is what AI training might be characterized as. That license creates lots of headaches for corporate legal departments. I switched to Valkey for that reason.
I actually prefer using MIT style licenses for my own contributions precisely because I don't want to constrain people or AI usage. Go for it. More power to you if you find my work useful. That's why I provide it for free. I think this is consistent with the original goals of open source developers. They wanted others to be able to use their stuff without having to worry about lawyers.
Anyway, AI progress won't stop because of any of this. As antirez says, that stuff is now part of our lives and it is a huge enabler if you are still interested in solving interesting problems. Which apparently he is. I can echo much of what he says. I've been able to solve larger and larger problems with AI tools. The last year has seen quite a bit of evolution in what is possible.
> Am I wrong to feel this?
I think your feelings are yours. But you might at least examine your own reasoning a bit more critically. Words like theft and stealing are big words. And I think your case for that is just very weak. And when you are coding yourself are you not standing on the shoulders of giants? Is that not theft?