I don't think I have been rude at all, and also seniority does not give any special authority over opinions.

My point was that the "creating the personal brand" part - which can seem something intentional - is just a byproduct of posting, writing and contributing. And he contributes because he has knowledge, opinions and things to say.

It's like writing your own blog with good content and getting organic traffic from search engines vs writing SEO content to get traffic and get noted.

Maybe I initially expressed myself not the way I really wanted.