Have you considered it might the best possible way to spend their time because they have hardships finding another job?

Of course!

I think most of us go to our current jobs only because we have a hard time finding a better one!

So, it wouldn't be too crazy to think then that those hardships finding another job would influence what they tell a customer asking them about whether or not they like their current job?

Now you're asking something else than what was originally asked.

They might say good things about their job because of the incentives to be positive and fear or losing the job. That's one argument that can be made, which I think is probably at least somewhat true: they might not like their job, but they won't admit it.

What you're saying now is something else (if I understood correctly) - you're saying they only think good things about their job, because they can't get another job. That's a totally different thing! That argument is: they like their job, but for specific reasons. An argument I find a lot less compelling (because it's always true!).