Is it worth joining the 10k design cohort for people who have a degree in design??

Depends on how much money you have and are willing to spend on the course, most of the people there are from good families, especially business people whose parents have made it in life and they are just to enjoy the cohort, they don't care of getting a role in design or not, so it depends on your way of looking at it. Also keep this in mind that their success ratio is very less, extremely low, just doing the cohort doesn't mean you will be automatically eligible and companies will be waiting for you, no! You have to learn from outside as well, and I must say a lot of learning is required. Some exceptional folks are there who got a role in a good company very fast, but that number of people whom you can count on your one hand, that's the number, so don't fall for it, especially if you don't have money please don't go, it's a place for the rich/high middle class to enjoy for 3 months, thank me later.

I am a pm who asked about this to some people who did this

It is very basic

Mostly the network is the benefit

Wont recommend based on what I heard

Network hai bss vha but pki pakai khichidi mil jayegi that can leverage your career

No

No