meh. I consider myself pretty fullstack - plastic forming to css and most things in between. Am I your guy to write the best ISR on some rando chipset - no. Am I your guy to write the most optimized query and tuning with a deep dive in the query planner - no. But I know enough about each respective domain to go deep when needed (google makes this more doable today than ever before) and I can get an MVP far faster than a specialist. I don't mean to knock specialists but rather to say there are roles for both and believing in one or another is the wrong place to focus.