There are entire countries where it's not a thing to use PayPal. Way too many people were scammed out of their money by them. In general you don't give your credit card number to random sites - it mostly goes to Stripe and similar services.
These days stripe is perhaps getting dominant, but there was an age before stripe and many small companies still have custom solutions. And how would Paypal scam you out of your money? I've only ever seen this happen to people who did illegal shit and even then you won't lose much unless you also use paypal to store money like a bank for some weird reason. But then you're definitely more of a merchant than a consumer, so it already sucks because of other reasons as mentioned above. If you use it only for sending payments, getting locked out is a non-issue, because there is no money stored there and I can always revoke their access to my bank account.
