The same goes for self-driving cars. It's a exponential, hockey-stick curve that at some point crosses the level of human ability. There is nothing "linear" about it and your suggestion of parallels to former experience is wildly misguided.
People fail to notice, most jobs are less complicated than math and programming. The "obstacles" there are of the kind of "we always did it this way", but that's no real "moat"?
The bubble regarding the big AI firms may well collapse, but the assumption, that was somehow improving the situation is far-fetched.
People automated out of a job will either compete with those in other jobs or be dependent on support. Either way, salaries will fall across the board and prices rise. At an ever accelerating pace.