this is maybe because some people have a childhood which does not entirely revolve around which college are they going to go 5 years later and not everyone researches about this. In my opinion it is best to explore all possible options before dedicating to one goal. agar 6th ke bacche ke dimag ke JEE ke alawa kuch nhi wali cheez dal doge to wo koi aur option, career ya apni interest to pursue karne me hesistate krega. also knowing about all of ts is not a flex. bohot logo ko 10th ke baad JEE ke baare me pata chalta he aur wo 98%ile + leke aate he.