He's far from the only one with that opinion. He's just the only one making a hundred redundant posts a day about it.
The Suns cannot build a winning culture with their current PG rotation. It's not about contending for the playoffs or flirting with a free agent next summer. It's about having a coherent five-man squad on the floor.
If Booker is sacrificed to PG duties, it will stunt his development as a SG, and if doesn't blossom as a SG, you've wasted him. Over the summer, the front office promised that Booker would not have to play PG. The reasons for that were sound, and now it looks like they've painted themselves into a corner.
PG is the most critical position on the floor to run a functional offense. Anyone who has been paying attention can see how impaired the Suns are. It's not because Booker is out or Ayton is tentative or Bender is an idiot. It's because the ship is being captained by someone who's utterly unqualified for the responsibility.
The Suns' PG situation is a crisis, and a team with a crisis at the most important position on the floor is a team in crisis, period. Another season of crisis is going to result in a step backward, not forward, in a year when the Suns can least afford it.