I don't think it's that personal. I've had people point out to me before that my thinking was a bit divorced from reality, and it was really helpful to be told that in no uncertain terms. Actually, some of the very best advice or information that anyone has ever given me. Yes, it was tough to be on the end of a blunt message like that in that moment, but over time I've realized that it was definitely worth it.

The reality of the situation is that there are at least thousands of different large-scale manufacturers worldwide across all possible industries that employ thousands of employees on up each. This is basically the history of the industrial/manufacturing revolution that we're talking about here. This should be common knowledge, and if it's not, the most helpful solution is to go learn more about it. NO OTHER industry is like software engineering, where all it can take is a dozen hackers to yield a billion dollar startup. Reacting in surprise that there exists a single manufacturing company of that scale in employee count, when in fact there are thousands, indicates that yes, you might be in a bubble.