People think that this RCS, blue vs green bubble is about customers ?

Google lost market share in messaging apps, they couldn't create an app that people would like to use for years.
this is like 4th messaging app that google created in last 10 years.
Google thinks that iif they can make SMS a modern messaging app and force Apple to use the same SMS standard then people will stop using third party messaging apps, then Google can gain market share in messaging app and make more money.
this is not about customers.
this is all about how google can collect data from messages.