Hi Tony,
It's not good though really to force this on it's users :-(
You are right Tony
Have you thought about using another maps provider (Bing Maps, OpenStreeMap, etc.) as JoomUnited on their extension MyMapsLocations (
https://www.joomunited.com/products/my-maps-location) ?
Would be a great alternative. As I have seen (YouTube, etc) a lot of users will go with another map supplier and leave Google as fast as possible...
Could I suggest you to propose different maps suppliers ?

On one of my sites, I've changed the way of showing the location on a map :
- putted the link of the place on Google maps in the link entry of a location
- changed the layout in order to propose a link to that map opening on a new tab/window
I really do not want to enter a credit card info onto any Google Service
Regards,
Stéphane