I would have said "true", or at least - I would have said "I do, but never incurring a charge on next month's bill", but with services like Flex from Monzo, you can actually get credit over 3 months with 0% interest rates, which not only makes buying stuff more likely, but spreads out the costs. It doesn't solve over spending though.
How much is it?
You could draw all of it and put in a a 2x leveraged SP500 ETF :-D for 3 month and then return the money :-D
Just don't let the credit card companies find out. The reason they give the money to you and not the stock market is to diversify their portfolio.
Imagine if all the shares in Bank X were paid for by loans issued by Bank X.
"Credit limit: £1200"