Not to say that your experience is invalid, but it’s not universal. Tho I am fundamentally against the technology in the first place, hence the opt out.
Tools are never the problem; it's their implementation, use, oversight, and governance. Seek change at the appropriate layer.
Disclaimer: I'd embrace any auth system that streamlines my travel process (facial recognition at TSA checkpoint and the airline gate), but also believe one should be able to opt out and downgrade to traditional documents if desired.
No, it doesn't. It annoys all the other travelers whom you are inconveniencing by slowing down the screening process. The TSA people who screen you are just going to follow their standard procedures in response to whatever you do; it's all the same to them.
The individual person who has to screen you might be annoyed at that moment, yes, since the procedure they now have to execute is more complicated. That doesn't mean "TSA" is annoyed. To that individual person, you are just one of many transitory annoyances that are part of a normal day at work.
I'm not saying it's worth any particular persons time to do so, but opting out does send a kind of signal. The more people opt out, the better, in addition to the steps you mentioned.
While this is always a good way to make your views known, that doesn't mean it will accomplish what you are seeking. Even if everyone who has a genuine objection to intrusive security screening at airports were to do what you suggest, I strongly suspect it would still amount to a small enough percentage of voters that it would not change the incentives of elected representatives.
The underlying point is that this is about risk aversion. Yes, people don't like intrusive security screening, but they even more don't like the risk of being on a plane that gets hijacked by terrorists, and they believe it's the government's job to prevent that from happening. That's why we have the airport security procedures we have. Unless that risk calculation changes, the procedures are not going to change.