I'm not arguing against having a good cry, I'm arguing for doing so by actually watching a whole movie or listening to a whole song instead of a an extract, kinda like the difference between eating some fruit and taking a shot of high fructose corn syrup.

I'm actually a filmmaker and highly value full length feature films. I'm not arguing against watching whole movies. But there is also value in short films, short form videos, and even just watching specific scenes of a film at times. If it makes you feel something meaningful that's all that matters. There is room for all types of experiences, no matter the length. Emotions only last for around 90 seconds so sometimes that's all you need in the moment. If you want a deeper or longer experience by all means please watch a full movie, I am not trying to stop you or anyone from doing that.