I would hate the North American system. From what I've heard (if it's true), in hotels, it takes you a lot longer to get on with what you're there to do, because you have to keep waiting for people to do very simple things that you can probably easily do yourself - parking your car, carrying your luggage in, opening doors, pressing buttons in lifts - and then having to get your purse/wallet out all the time to give them money as a reward for delaying you. Some of them are non-jobs that you didn't need somebody to do in the first place, much less paying them extra on top.
Um, not at all.
First of all, you can almost always do these things yourself. They'll usually ask if you want help with bags, etc., and even if they don't it's never impolite to say "I have my bags, thanks." And it is a vanishingly small number of hotels that force you to use valet parking, and they're almost always in places where it's nearly impossible to find parking or at terribly posh hotels where anyone staying wouldn't blink at handing $5 to a driver.
Secondly, these services are done quickly and competently (in the very few hotels that still have elevator operators, how long do you think it takes to press the button?). I suppose tipping acts as an incentive for that. And frankly, when you get off the plane with loads of baggage it's an utter delight to have someone else load them up, bring them to your room, and put them where you want them to go while you deal with carrying children/wrangling families/just not having to deal with anything.
Finally, if you don't like a full-service hotel, you are welcome to go to one without full service. (I mean that genuinely, not snarkily.) Many people choose full-service hotels because they like the comfort and ease of being able to call down for the car to be ready for them or have someone else deal with transporting their bags. If turning these services down makes you uncomfortable, though, there are plenty of hotels that don't even offer these services.