It really only matters on an individual level once you become a manager, and have both juniors and seniors to manage.

It matters to me as a senior+.

When I talk to a senior: “hey we got this initiative, I know only little about it. Can you talk to $stake_holder figure out what they need and come back to me and let me know your design ideas, how long you think it will take, etc”.

I can do that with a few seniors and put Epics together and they can take ownership of it.

For a junior I have to do a lot more handholding and make sure the requirements are well spelled out