If he was separated from his business or showed any sign of public opinion not bothering him you would be right, however gumming of the phone lines means his executive staff will know about it and be forced to act, which means Trump is directly impacted by this activism.
You are complaining about people having a shitty job being paid to do their shitty job. Do they realistically have their choice in job? Not really, but they are working for the President’s brand.
