IMO, that's super myopic. When intelligence agencies do something visible to the American public that causes any sort of discussion, it forces what they are doing (which is usually supposed to be secret) into the spotlight, which makes them generally more accountable. They do not like to do their job with people looking over their shoulder; they typically avoid this wherever possible. Besides that:

* Even on a very good day, the government is demonstrably bad at deploying new technology, especially at scale.

* Especially when that scale involves training any personnel at all.

* Especially when people are wary of that technology anyway.

* Especially when they are deploying suspicious technology in a visible arena.

* Especially when this technology will be observing US persons.

It doesn't look like it from the outside, but there is a lot of politics and bureaucracy in deploying a system like this, not just internally, but also from places like politicians.

In my experience, people who have never been around an organization like the FBI seem to have a naive view of what is possible. My recommendation is to critically evaluate anything that anyone tells you about what goes on in such places.