Pretty much, yeah. You can probably save up to buy a cheap used car, and you may be able to save up to buy a new car, but you definitely won't be able to just pay cash for a house unless you've got so much money the rules of personal finance are totally different.
You also need good credit to rent most apartments and to get many kinds of jobs.
Edit: I almost forgot, cashback is pretty cool too. 2% of your expenses for the year can be quite nice.