Just like building up your muscle, it takes time. Which is why you don't see memes/people saying: "So weak that you can't lift 100kg? just say no, and raise your arms while holding a 100kg weight!"

I mean, logically stopping depressive thoughts is the only way to stop depression, the same way as how lowering the caloric intake is how you get rid of obesity, or lowering the resistance to insulin is how you stop being diabetic type 2. Or how the only way to be someone who lifts 100kg is to actually lift a 100kg weight.

The problem is not that it's incorrect, in fact it's something very obvious... to the point that it's condescending rather than helpful, since it forgets to mention that you need training to reach that goal.

It's not like people don't know that depressive thoughts make them depressed... or calories obese.. or lack of exercise weak.. what they want is advice in how to train themselves, not someone telling them they should "just" stop being the way they are (which is probably something they already keep reminding themselves about, without needing your help for that).