> To cut a long story short — due to moving to another country, I wanted to update my developer account to follow all the rules related to taxes in that country, but with Google, it’s not so easy, you can’t change the country for an existing payment profile (and also create a new payment profile), you need to create a new Google account, then pay for a new developer account and only then create a new payment profile and transfer your app to that new account.

These don't seem like the right steps. You can definitely have multiple payments profiles for one account, including from different countries (I do). There's no need to create a second account.

The instructions the author links to aren't suggesting creating a new account either.