Most students live too far away from campus to make a one-hour consultation time on a day other than your tutorial worth going to. For me, I only go to uni 3 days a week and it takes two hours to drive there and back. Fuck going all the way there just to ask one or two questions. This is the 21st century. If I can order food online and get it delivered without having to leave my home, why would I leave to ask a question that is just as easy to ask in an email.