Will para falar de hábitos, ações no presente em inglês

Alguém poderia explicar porque utilizou-se o WILL nesses casos? Ele não poderia simplesmente usar o simple present?

[DIÁLOGO]

- Sarah: John, tell me about your day. What time do you wake-up?

- John: Well, let's see. Some days I wake up early. Maybe about 6 o'clock. Yeah, sometimes I wake up at 6 o'clock.
When I get up early, I like to get ready for the day, take a shower and have breakfast. But other days, I don't like getting up early. Maybe I'll sleep in until 10:00 or 11:00.

- Sarah: Wow.

- John: Yeah. I like sleeping in late. So sometimes, I wake up at 11:00. On those days, if I know I won't wake up until 11:00, I'll take a shower the night before, before I go to bed. How about you, Sarah? When do you usually wake up? ...