I think, the parent comment meant that they would like to get a virtual card, so that they can attach it to a service (e.g., create a virtual card for paying your netflix subscription only, and then another card for hulu only, etc.), and then simply remove that virtual card when they want to stop using that service. Especially helpful if the service makes you jump through a ton of hoops to cancel your subscription.
Correct. I use Apple Pay with a web service (Hover, domain registrations) and with an app service (Uber).
In the case of Hover, I have performed a single authorisation, and it is now capable of performing repeat transactions against my card. There is no interface within Apple Pay (that I can find) to remove that authorisation, I have to ask Hover to do that.
In the case of Uber, I perform an authorisation for an expense before I know what the amount is, and I'm not required to re-authorise when tipping.
The Hover example is the problem. Not specific to Hover, but rather specific to the lack of virtual card management within Apple Pay.
Virtual cards by definition do not have to be single use, (un)fortunately.