I think you’re reading into it a bit too much. The comment you’re responding to is just a simple statement that with xyz skill your market rate is n dollars. There’s nothing there about how you should feel about it
Market rate seems to vary widely for programming jobs (less familiar with data science, but it's probably similar), as sone companies can afford to pay a lot more than others, and some developers are willing to accept a lot less than others. And this is often independent of skill levels.