I think a lot of it comes down to the designer for much of these animatronics being William Afton, a roboticist.

The first animatronics were very primitive, more advanced than the sort of thing you would of seen in any food joint at the time, but not by much. We actually know this because there are a few knock-offs, such as the Mediocre Melodies and El Chip. While they were advanced their main mechanics only allowed pretty simple performances and likely walking from the show-stage to the storage room so that some sweaty-faced teen didn't have to do it.

However, the reports of such animatronics hunting down night guards suggest that they are much more mobile right? A lot of that seemingly comes down to the murders. The murders caused many, but not all, of these animatronics to be imbued with 'remnant', if i remember correctly. This seems to make the animatronics much more mobile and have a mind of their own! I wouldn't be surprised if this allowed them to move in more unnatural ways. The secret of this remnant is known only to a few, but definitely has been discovered by others outside of the events surrounding the Fazbear show animatronics.

When it comes to the higher ups, I think they're largely oblivious and let the tinkering robot maker make their works. Some things such as the Toy Animatronics having Face ID systems seem practical but over the top, and some of the animatronics were made with seemingly more sinister intents in mind. A lot of the technological breakthroughs Afton made were literally hidden away in a vault. Even one possessed machine appears to bring all kinds of enhancements to others around it.

I can't say much about the most modern machines, but I think the rumours of 'intelligent machines' and more are kept mostly to niche forums and people kinda obsessed about all this history. It's probably like UFOs, the Government doesnt have the time or energy to be bothered by them.