This is an interesting question... And I'm loving the discussion in this thread.
My two cents...
I think "experienced" in the sense it's being used here has a very specific meaning. It doesn't just mean that someone has written a lot. After all, writing a lot doesn't necessarily mean you're writing well.
For me, an experienced writer / artist is someone who has created enough material to thoroughly understand their own process, their own strengths and weaknesses, and also the various challenges in producing a finished, polished work.
The way I look at it, experience isn't something that quashes creativity or instinct. It is something that helps to harness those forces, to call them up at will, and also helps to reliably produce the best art possible in whatever timeframe it needs to be produced.
If an experienced artist is willing to share, an inexperienced artist can learn tips and tricks, be introduced to different perspectives, and gain forewarning about upcoming obstacles. They can get a map of the kingdom. But just like any other map, there are many, many routes, and it's still up to each artist to figure out the best way for themselves to get where they want to go.
If you're feeling pressure to do things a certain way, it may be because the person giving you the hard sell came to that method through a lot of work and trial and error. It could be they're trying to save other people the heartache they experienced. On the other hand, sometimes there absolutely is a right and wrong way to write something. Resumes, for example, or academic papers.
It's true that in art you run into situations where people say things must be done a certain way. Sometimes it's for good reasons, sometimes not. Since my background is performing arts and traditional Japanese culture, I like to find out why a thing is done a certain way before I go off and throw tradition to the wind.
More than thinking that there is a certain way things are "supposed" to be done, I think that there are ways that make things more accessible to an audience and less accessible. Things that are off-norm are less accessible, and generally make the work harder to understand. That's not necessarily a bad thing, but it is something to be aware of both when creating and when looking for feedback.
Ultimately, you are the only one who can decide how to make art that is true to you. And that "you" will change with time and, yes... experience.