Comment by johnnyanmac

Yes, it's not the full equation. But that type of environment gives you a mindset that isn't present in most other types of coding. The ability to think under pressire, identity the fastest solution, and store a number of approaches in your head should you encounter dire edge cases.

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>the skill is more having a detailed knowledge of the inner workings of every layer of the system so that you can come to the right conclusion

Yup, and that's transferable skills from competition coding. You're not juggling algorithms in your head per se, but you juggle whatever tribal knowledge needed as options to cycle through. That combined with the above mindset can lead to such skills.