1-True, that’s what i meant.
2-It’s all a din in your kavana. If you take a sefer or an audio shiur to bed with you with the intention that it will put you to sleep, that’s a problem. However, when your intention is to learn and then you end up falling asleep, that would be okay (but not Lichatchila).
So for some people to post saying take a sefer or shiur to bed, that is not so okay (i think).