There are reasons to use a credit card - you get purchase protection, for one. You also can build up credit if you want to buy a house. You need one to rent a car.
But really, while there might be other reasons, the only reason to get a good credit rating is to be able to buy a house. Everything else can be paid for in cash (check, online payment from your checking account, etc)
When you use a credit card, you should treat it exactly like cash. You should have cash in the bank before you purchase anything with a credit card, and then pay the entire credit card balance each and every month.
If someone has a problem with this and just can't do it, then they should not get a credit card at all. Credit cards are very dangerous technology if one can't control it. Just like fire - if you are not careful with it, you can set your house on fire.
I don't disagree with what you say. I personally loathe credit cards and credit in general, and I personally don't use any type of credit. I pay for my cars in cash.
I don't think you get the same purchase protection with a debit card vs credit card.
As far as renting a vehicle, I've tried on a debit card and been denied. But that was quite a while ago so things could have changed, and I guess have as you have done it.
You still get protection from a debit card but the bank will cancel and re-issue since it's considered a point-of-sale. I've had to do it twice. Banks are required to do this due to consumer protection laws. I actually think the CC protection leads to more fraud, I've seen over and over people on this very website say things such as I'm being silly for how careful I am with my debit card because the CC company will just pay the fraud. I think it creates more risky behavior. It would be akin to wrecking into people out of spite because you have car insurance.
As for renting a vehicle, their requirements are usually a bit more stringent, things such as showing more documentation that I live where I say I live, they'll put a hold on a larger amount, but I've never been outright denied from renting a vehicle for having a debit card.
Of course, having said that, I was denied the last time I tried to rent a vehicle because they had started running credit checks and I have no credit. This despite the fact that I had been renting regularly from them for 7 or 8 years (a few times a year). Can you imagine thinking credit was a better proxy than your own records for determining someone's trustworthiness?
I've never liked rental car companies, they're all shitty in 1 way or another, but that for me was the last straw. It will be a cold day in hell before I ever rent a vehicle again.
