So both Paypal and Visa/Mastercard get a cut of every transaction. At least with a regular virtual card Paypal isn't getting their cut. Having Paypal as a middleman will make chargeback requests harder as well since they likely need to be negotiated with before the actual card issuing bank.
I use "virtual card" for those needs. For me, it doesn't justify bringing out PayPal
I've had to use it when my bank's purchase limits did not allow for card (virtual or real), but the same purchase was allowed when going through PayPal. It was annoying AF, but was much faster than contacting my bank and getting permission to spend my money.
Privacy.com is a better option, but some merchants block it.