If you expect perfect factual accuracy from your teachers, yeah. On the flip side, they don't have the curse of knowledge yet i.e. it's still fresh in their mind what was difficult in the beginning, so they can probably explain very well. Just keep in mind who's teaching you, and it's just like if a co-student teaches you.
And if you feel you have to take what you hear with a grain of salt, that's probably good for your learning too.
