When it comes to the topic of education, no one would deny the huge importance of educational institutions. We learned the basic ability to read and calculate in primary school. We get specialized  training in a certain field in college. We may also start out with the first self-made meal in a cooking trainning class. But regarding to the responsibility of educational institutions, I disagree with the claim that institutions have to tell their students, what to do or what not to do especially in colleges or universities for three reasons.
The first reason I hold is that the true responsibility of educational institutions does not lie on preventing the possibility of failure, but on theaching students what is the basic requirment of being successful. Only focusing on success may sound utalitarian, and we do not want schools to become factories of producing similar successful men. In fact, schools, especially colleges and universities, should train  their students in the aspects such as the  ability to success, and  train them to be hard-working, decisive and brave.Every summer in the graduation ceremony, it is not hard to find from the graduate's speech that they cherish their college life not because of the specific knowledge they have learned, not for the big chance to make money or earn huge fame in the future career, but for they have learned how to prepare themselves for succeeding in the future. Hence, I do not think educational institutions have to prevent their students from the less-possible- to-succeed fields since that is not what studdent want to get from education.
Second, I disagree with the word 'unlikely to succeed' for the reason that any educator cannot  predict what will be viewed as success in the future. None of us has the ability to predict the future so that judging the future on the basis of today's view seems to be unpersuasive. For example, in the 1960's, computer science as a new displine, were not known to be a bright filed for  most of students. At that time, choosing this field may seem dangerous for one's career. However, no one could see that the computers are indispensible in today's life. Things once seemed impossible become possible. If the teachers and faculties at a 1960's college dissauded the students for choosing computer science, their students lost the chance to glorify in the later time. 
Third, instead of making decision for the students, the teachers should help them analyze the situations. Under any circumstance, teachers should be advisers not the designer of student' life. The student is the only person who has the right to decide what he wants to be to blossom since others cannot live the life for him. For example, when a student want to choose archeology as his major, the teachers or advisors should help him to the job prospective ,the salariy level, the research condition instead of just briefly saying that digging the ancient sites is not likely to earn fame and money. Indeed, suggestions of choosing acdemic field is important but not the most important. Thus, educational institutions do not necessarily prevent their students from the hard work witch seems to have no bright future now.
In all, I want to say students get education  for the desire to be a good person. A well-educated human means the person has the ability to accomplish in a certain field as well as the ability to find his way in some unlikely-to-succeed fields. Thus, teachers or schools should provide the chance for their students to try instead of preventing them from possible failure.