Imprecise concepts are attractive for the inexperienced mind
If you write in an unclear way about big ideas, you produce something that seems tantalizingly attractive to inexperienced but intellectually ambitious students. Till one knows better, it's hard to distinguish something that's hard to understand because the writer was unclear in his own mind from something like a mathematical proof that's hard to understand because the ideas it represents are hard to understand. To someone who hasn't learned the difference, traditional philosophy seems extremely attractive: as hard (and therefore impressive) as math, yet broader in scope.
Couldn't the same be said about what we read today? Couldn't the same be said about concepts like following your passion, being a rockstar, overcoming your fear, you can do anything, and happiness is all that matters, to name a few?
Aren't these vague concepts, with a lot of appeal for the enthusiast but inexperienced mind, as impractical as traditional philosophy may be?
I think so.