You sound like a scan junkie .I guess it's addictive . I notice that customers in 711 ,like yourself,use their phones even for few baht purchases .🤔
I think this only applies if you have online banking .I was in Bangkok bank to get a new passbook recently and the clerk never asked about my phone number .But I don't use online banking .
Farang retirees are tolerated ,not welcomed, in Thailand .That's OK with me .You chose to come here .If you are unhappy you know what you should do. I know some grumpy old buggers who are always complaining about life in Thailand ,but they would complain wherever they lived 😊