A box of Fiasp or Levemir insulin costs $477-$560.
The better insulins cost more.
If I give myself the $24.88 WalMart insulin, I can not eat lunch at my regular time and then have to eat in the middle if class. (Assuming I had a high blood sugar reading going into lunch and gave myself R an hour before lunch.)
If I can afford the Fiasp, I can go ahead and eat at my regular time. It's just expensive.