So then, how do you prove that you are in a different country? Easy, right? There are multiple sources of information that can prove your location - GPS, mobile service provider information, IP geo-location, Wifi SSID databases... . But no - none of that is enough. You have to add a local payment method! And coincidentally none of the payment methods other than credit card information works - not even the one provided by mobile service provider. So, you are forced to register your credit card information to prove your location.
Now that your have proved your location and installed the essential apps you need, may be it's time to delete the credit card information. What if you accidentally subscribe to some service you didn't want? After all, you aren't subscribed to any service or bought anything with the newly entered card. So it should be easy to delete it, right? NO! You are not allowed to delete your only registered payment method! [1] Now it's open forever as a payment method for online services or Google pay.
Google's tactics here are sleazy, underhanded and manipulative. And what of the complaints they receive about it? See for yourself - discussion locked and disabled! I don't know at what point their behavior is declared illegal and anti-social.
[1] https://support.google.com/googleplay/thread/10797082?hl=en&...