The math career is going to killed off 2-3 years before law and medicine and Wall Street banker. How does this make me more secure in any way?
This is indeed also coming for law, medicine, and banking, though licensed professions will hold out for longer because you need someone to put in jail when things go wrong. The problem is that all this is extremely over politicized and nobody is able to think clearly. They want to simultaneously say all this is just hype and a bubble and will go away like NFTs did, and also are starting to worry about economic replacement. Some more coherent political narrative will have to be formed.
Regarding being jobless for the 3 intervening years, it is certainly a personal concern but in this temporary phase there are still some other jobs for smart people. Once there aren't any, we are entering the part that I was talking about where you will be far from alone and you can join together to exert some kind of political pressure but it will not be about math PhDs, but employment as a whole. And it may not be very effective if AI is on the other side, not on yours. Yeah, it sounds like scifi, and people want to dismiss scifi concerns and instead focus just one inch ahead of their toes, instead of seeing the writing on the wall.
> people spending their lives trying to promote humanity
What does this even mean? Become a monk? They are credited with helping humanity.
Ahaha. Flowers are the way to go.