In case you want to install many new database instances so you want to have everything automatized without human interaction inside this process.
From this point of view there is need to have new feature in DPA REST API so we can programmatically not only register new DB instance but for full automatization we need to programmatically
assign every new registered DB instance to Alert Groups. Otherwise the Alert Groups does not run against new registered database instance and you are not informed in case of issue.