As a United Gold or higher you can access a United Club at any point of an INTL itinerary as long as you have access to the terminal. So Club Card doesn’t help any further on that.
Bottom line it is simply what you value use of domestic United Club on domestic itineraries. I canceled the card during COVID and have since become lifetime gold plus spouse, so I will likely never buy membership or that card again
One other aspect is Club membership also gets in a spouse and dependent kids. That made the difference for me for many years. for singles obviously not so relevant
My guess is the PQP temp benefits will be extended in 2023 but not beyond.