I didn't go into the subject enough. I agree with you both.
If you have a senior teacher that you particularly like (and they are not "concert masters" or teachers that just show you their waza, but actually lay hands on the students and pass on a transmission) then it is still easier to get that teacher to 30 students than to get 30 students to the teacher.
It's great that you take the initiative to go to the teacher. That is, of course, the best way to go. However, there are many people that can't afford trips two or three times a year along with their normal training. Both of these training modes are good.
I definitely think it's best to find the teacher/s that you learn best from and get with them as much as possible.