Exactly. I think people will use lightning because it's user friendliness. Imagine a future where a big percentage of the world gets paid in BTC for their work. I can see two examples:
  1. Freelancers getting paid via LN and using it for day to day payments. Then at the end of the month they could send a portion of it to a cold storage as savings.
  2. 8/5 employees receiving their monthly salary on chain and then sending part of it to LN for day to day expenses.
And on top, of course, you have to add all those new ways we are exploring right now with value4value apps and stuff.