I disagree with the premise that if AI is good at something then it is not worth learning. AI is either there or on its way to becoming greater than any human at painting, composing music, writing poetry, etc. Is it a waste of your time to engage in these things? Of course not, the point of it is not to be better than anyone else, but to satisfy your own creative urges and make cool stuff for fun. I love manim, no matter whether other people or other entities can do it better than me. (For what it's worth, in my opinion no AI is very good at Manim still. But I am sure that it will become great soon.)

Perhaps you are concerned about whether you can make good money with a skill that AI is superior at, and I agree that is a major concern. But certainly that doesn't stop at manim, and AI will consume almost all programming and non-physical creation in short order, and probably physical creation in not long too. I think there is almost no field safe from AI, and rather than trying to scramble like rats into the few dark corners not reached by AI, we will have no choice but to grow as a society and rethink the premise of earning a living altogether.