Don't get me wrong, it's a valid pursuit, but I'm not convinced by the arguments presented.
Instead you can say it opens the door to more serious work such as say language design, operating system teams, things like that. It rarefies your skillset especially if you don't suck at it. You aren't likely to get an important position at say, nvidia, by going through bootcamps. The crack of that door is open much wider for those with a Stanford PhD in hand. I'm sure there's exceptions, but I'd imagine they're quite rare.
I think it's unlikely, however, to make you necessarily more proficient in the latest churn of frameworks to implement the latest churn of websites.