The comment I replied to suggested that people who are not fit or suffer from sleep disturbances are willfully unhappy. I don't feel it requires much thought or experience with the subject matter to see that this is false. There are many easy counterexamples which I'm sure you can come up with even if you are only barely determined

No one is disallowing the parent, you, or anyone else from discussing or thinking about complex phenomena. If someone is not putting in the work to engage with the material, others are free to point it out, and they do so at their leisure.

I hold others to a higher standard when the stakes are higher. Specifically, the post I commented on was (likely unintentionally) not only factually wrong, but stigmatizing people with sleep disturbances. This is why my tone was dismissive and condescending. This was intentional.

I don't care to give examples because they are easy to find if you are asking in good faith. I even posted one in direct reply to TFA.