Skill doesn't come from nowhere. It comes from practicing it and thinking about it and otherwise being mentally engaged with the field.
And yeah, I'm pretty sure that after 100 years of cooking, and learning how to cook, I'd be better than the person who put in only 20, just by sheer virtue of more internalized knowledge, more time to think, and more practice.
Each person brings an unique set of skills based on their experience (professional and life).
I have worked in lots of different industries from designing hardware chips with VHDL to multi datacenter kubernetes deployment with 100k of cores.
I never did side projects neither did I expect more time on the chair from a coworker... Still somehow I can build winning teams with all the different mixes and industries.