I agree that that service should be considered in the price of the rental, but I disagree that it should be separate from the rest of the rental fee. It's required, and it's only separated out to make the rental look cheaper, right up until you get hit with that fee.

>it's only separated out to make the rental look cheaper, right up until you get hit with that fee

That's certainly one reason. But it can also make sense to have a one-time fee that's independent of the duration of the rental. Cleaning a room is the most obvious example. But there are other more or less fixed overheads that are largely independent of the length of time something is rented.

If you're renting out just about anything, would you prefer seven 1-day rentals or a one week rental?

That's not quite true. The car has to be inspected and gotten ready for rental.

Consider the amount of work involved for the owner in renting one car to 30 people each for one day and one car to one person for 30 days and you'll see the difference.

> those are understandable because someone needs to

Nope. The rest of this sentence doesn't even matter: if someone needs to do something, that's a reason to charge for it, but not a reason to hide the price.