Yes, the shirt doesn't matter. The point is that people like the tech. And that's OK.
I assume Pablo doesn't like it. And neither do I. That's OK too.
And probably this is not the moment to tell people in their face "excuse me, sir, but your tech sucks", but in the future it may happen.
Better tech means a better life for everyone, and the obsolescence of popular bad tech will be worth it.
And I'm not talking of Docker as "a problem" here, rather it's a symptom. It solves a problem that shouldn't exist in the first place. It is a consequence of many decades of bad tech.