This is all true but note you've still started grinding in your 20s. I'm thinking more like if you take a teen or early 20s and they grind 10k hours on leetcode

This is all true but note you've still started grinding in your 20s. I'm thinking more like if you take a teen or early 20s and they grind 10k hours on leetcode and you take a 30s or older and they put 10k hours too who would come ahead? My bet would be on the young ones.