Sustainability: As a student, or a non-student?

Kurashiki, Okayama Prefecture, Japan: Such a nice place to just chill. Very small-town feel. Just looking at old photos.
As a student, the concept of sustainability focuses on recycling, bringing a eco-bag to the grocery store, bringing a tumbler to class, using recycled paper, blah blah.
What about when you graduate university and start working 40 hours a week?
It’s interesting because this summer, I am working 40 hours a week. And just like that, my concept of sustainability has changed. Everything in life is now about convenience. If it’s not convenient, I probably won’t do it, even if it’s green.
As a student, I definitely have more time. I want to procrastinate… so, I’ll do things like wash my steel water bottle every day… bike to the grocery store instead of drive… not use my dryer and hang-dry my clothes instead.
Now, I come home at 6PM and I’m tired. I need to buy food - I’m gonna go drive there. I need to do laundry - but I need the clothes for tomorrow, so I’ll use the dryer. I don’t feel like washing my water bottle - I’ll just buy a water bottle on my way to work.
It’s kind of sad but it’s true. Maybe it’s just me… I realize why not everyone uses water bottles, why everyone doesn’t do these “small green things” that I thought were so easy!
It’ll be so much easier if everything we did to begin with was green. Haha.