There are two kinds of mentors.
One is a tutor who concentrates on academic writing. This kind of tutor doesn't care about interests, but only cares about his position in the academic circle. He has many excellent papers and will certainly make outstanding contributions in his own research field.
Another kind of tutor is a tutor who focuses on doing projects. Doing projects is nothing more than making money, but it will also exercise students' working ability. Following this kind of tutor is equivalent to working from scratch, which is very helpful for future work.