This is just in western economies. Eastern economies look to IA not as a work-force replacement infrastructure but as sophisticated complementary technology.

Yes, if there are not enough humans to do the job, robots will step in, moreover, they are already stepping in to lower production costs through increased finished product output (not through lowering wages costs, already low in Eastern economies).

Aside increasing industrial production output while lowering costs, the IA tech can increase human output in many fields, all are being live-tested in the East, chatbots are just a single tool in the toolbox, a big toolbox with thousands of tools.