Earlier quoted context omitted.
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Seems like a somewhat traditional suggestion with a potentially massive financial and time commitment. Not that it's not something to do, but why do you think that's the move right now , especially since they're clearly established in their career and nobody cares about it after a few years?
I actually started studying part-time for a mathematics degree earlier this year, and I don't plan on stopping that now. Having a degree does open doors at more traditional companies and government jobs, and it would also make immigration to another country sometime in the future a lot more straightforward. There are definitely benefits, even though I'm established in my career!