Why do you argue against something you don't want to take the time to understand? It's clear from you comment you didn't watch the video - even if you hadn't sa

Why do you argue against something you don't want to take the time to understand? It's clear from you comment you didn't watch the video - even if you hadn't said so yourself. If you watch it you might both understand it better and have something interesting to add. I don't get why people comment on articles (and videos) they didn't look at.