Earlier quoted context omitted.
One click checkout vs filling in credit card info on yet another website. None of your issues apply to using PayPal as a form of payment; you don’t need to keep a balance at all.
Apple Pay, Google Pay, Amazon Pay, and various options across the world such as 'Link', iDEAL, Swish, etc. Paypal only still seems to be a major thing in the US where modern payment methods are still very much behind the rest of the world.
But of course, when people on here say "the rest of the world" they typically just mean "Europe".