IMO you should ideally go into a field that has at least some job opportunities (if you want to be a “dog psychologist”, you need a backup plan with that small of a market!), but you should focus on fields you are good at and that captivate you.

You don’t want to make an economic blunder and pay for a massive tuition bill and find out there are no jobs in that field, but a talented, motivated, and ambitious landscaper is going to be happier and have more opportunities in landscaping than someone whose heart wasn’t in AI/ML, or whose heart was in it but they just aren’t good at it, and they pushed through to get a degree in it just because “that job market is strong and should continue to be”.

I review resumes and do interviews with AI/ML candidates for positions, and I don’t care what degree they have, or how desperate we are for talent, if it’s clear they aren’t that good or aren’t that into their field, no job.