If they are doing all the jobs, who is going to receive economic opportunities? Will we no longer be able to participate in the economy?

In what way do you want to participate when there's no economic value in any of it? Just do whatever you want for yourself; you're free.

The freedom you’re describing is the freedom of a domesticated animal, by the way. With the same outcome if you become a nuisance

Well we're animals and "domesticated" is synonymous with "civilized", so no problem there. And I can't see why anyone would make themselves a "nuisance" when literally all their needs - and most of their desires - are being met, so whatever outcome you're referring to is extremely unlikely.