I think we have an easier job determining right away if humans are lying about something

I think we are equally bad at determining lying between humans and AI. The people who are getting fooled by AI answers would click the top result on google and get fooled there as well so I dont see it as a massive decrease in info quality even though I can admit it is a decrease.

So it sounds like AI is only really useful for your line wider area of work

There are plenty of jobs where it will be more and less useful but my claim is that its generally still useful for majority of professions/people as a quick way to retrieve info via natural language querying. The results are mostly accurate and can include sources if you ask. Thats good enough for most people and most questions. Sure if you need to dig through docs or reference the exact paper then you can search google and get it yourself.

I dont think Teachers is a good example, teachers use it all the time and seem to really like it, idk what structural engineers do so i cant really comment. But even if the engineer has no use I still say its a good feature because not every feature of an operating system has to be used by 100% of people. Windows screen read is a good feature but I dont use it. The share button is a good feature even if I dont use it. Carplay is a good feature even if I dont use it etc.