Seniority to some degree is about enabling others and having the overview. The big problems are rarely the precise code being written (it /can/ be the case when

Seniority to some degree is about enabling others and having the overview. The big problems are rarely the precise code being written (it /can/ be the case when working on a specific algorithm or something) but large parts are about architecture, code review, ... and understanding the business needs aside from core technical skills. If a senior shares their experience with 5 juniors it is (especially long-term) better spent than them hacking something alone. But as always: ymmv