> Devs shouldn't be isolated or left to just code. Bypassing TPMs, PMs, and talking directly to the customer always reveals more about the problem, in less time, and with higher accuracy

This is a super common misunderstanding for recent CS grads. School projects being well defined and fully spec-ed can make newgrads expect that's what their work ought to be. Good PMs and TPMs are super valuable, but their value doesn't come from spec-ing work or anything like that. A good engineer always talks directly to the user, and a good PM works to facilitate that