Honest advice or political correctness?

I work at a small startup that was acquired by a large corporate, primarily via high level contacts of the founders rather than technical due diligence. Founders and employees cash out big FAANG-level payslips without bothering about any actual work or revenue.

Being in my late 20s, I believe that our energetic youth should be spent on doing something that we are proud of, when we look back on our younger days. Imagine yourself in your 60s, and your grandchildren look up to and ask you about your life. I would definitely get depressed if I had to tell them that I did nothing of significance, just collected my salary.

In this context, I have been telling a few of my close colleagues how we can learn specific tech stacks which are in demand, in interesting domains that we can shift to, if applying to other companies. However, recently I came to know that some of these colleagues have shared screenshots of my conversations with management and claimed that I am violating company policy by apparently encouraging people to apply elsewhere.

Didn't see it playing out like this, so it's a shocker for me. Going forward, what would you suggest? Keep my mouth shut and be company policy-wise correct with people to avoid such backstabbers? Or should I continue to be honest and just change company myself?