@Ismo comments on post "agile is not ..." - thanx for highlighting this. I meant here architects and testers which are OUTSIDE the team, people who think we are superior compared to "stupid" designers and coders, which are too proud of themselves, who think we are the only ones which are smart here, people who think that without them the world will collapse.
Instead the people could focus on (team) learning, improving the entire value stream, improving the big picture.
IMO - this has nothing to do with silo thinking, as this is observed reality and certainly not the target state for which I would aim to. Obviously I need to be more clear in future on what is observation and what not.