When I moved to Canada I couldn't believe what a scam they were. In Europe, my credit card was essentially a debit card with some of the advantages you get from the credit card (like online or international shopping or better protection); it was all I needed.
When my wife told me I needed a credit card, I was like no I really don't. Then she explained to me about this credit system they had set up and how you needed the card to build credit, how there were these people called debt collectors, how anyone moving to the country wouldn't have credit and thus would be fucked, like starting the race with a weight tied to your leg... I went to the bank and got a debit card at first, but I couldn't shop online, it didn't work anywhere but in my province... They were clearly pushing you towards the credit card.
For reference, in my country, credit scores don't exist, it makes no sense that if ten years ago you struggled, it would hunt you now. Instead, say for a mortgage, they look at your job security, salary, savings, assets... Basically, can you or can you not pay? Not whether you didn't pay every month when you had another job and your life was completely different.
Debt collection in my country would be illegal, and I mean a debt collector would go to prison for doing their job, and seeing how they behave, most deserve it. Instead, if someone owes you money, you take it to a legal court and they arbitrate. Crazy, I know.
The credit system is designed to make poverty chase you throughout your life, tempt you to buy what you can't afford and, essentially, preventing you from improving your financial situation. Well, that, and to make a few assholes even richer.
Edit: thinking more about it, the fact that the system punishes someone who never needed to acquire debt, was always able to save up and pay everything upfront, literally the most responsible person in the world when it comes to finances, because they didn't play a game with points and scores, should tell you everything you need to know about this system.