Art history is riddled with such free-thinking products. To an extent punk is derived from the avant-garde movement.
Closer to home, there wouldn't be data science without statistics though you can find data scientists that don't necessarily grok statistics.
Same with full-stack JS devs that skimmed CSS and/or web design history because doing everything in JavaScript in the name of reusable components and reduced mental overhead is what Facebook does, so it applies to every case given the weight of the benefits (without taking app weight and projected expansion into consideration).
This is IMO one of the reasons we get so much cargo-cults and tribalism around software development overall. Too much detachment in the name of abstracting complexity away.
Reflection time is hugely needed. But I don't know that it's hugely important to distinguish in that time between reflection on your "own" thoughts and those that originated in some way outside your head, because at some level it's impossible to make the distinction. You'll need a huge base of exposure to other people's ideas if you hope to assemble them into a new and interesting combination of your own.
[0] https://www.elfproductions.com/news/2017/6/25/applying-imagi...