there are plenty of boys in yeshiva/kollel who do not have a passion for learning they do it because that is the culture that they were brought up in.
Pretty good culture to be brought up in. As I mentioned to apushatayid, “mitoch shelo lishma, ba lishma”. Again, I’m only referring to those actually learning well, which, in my experience, doesn’t happen often unless there’s a “geshmak” in it.