I'm not shy, and I don't have a problem with depending on others for advice or opinions. I keep everything to myself in regards to feelings etc.
You won't see it as a problem, because that's how you function. In your case, it would be more of a problem if you never relied on others for any advice or opinions.
What I meant before is that it's more a problem for someone else depending on you, because whether that person knows it or not, they're actually depending on you
and one or more other people. But, just to clarify, I'm not saying
all extroverts depend on others for
everything either. I'm sure you have to make your own decisions at times, and disagree with the opinion of others as well, just like introverts do.
It's more just the whole notion of there being this extra level of dependency. To give some examples from my childhood: "There's no way I can be friends with X because Y hates him/her", "I can't tell Z that because they'll tell T", "If I give Q that, I'll need to give S one as well", "I can't hang out with R because Y needs me more" etc. You basically have so many relationships dependant on you, that you end up being controlled by them.
With introverts, they'll do something because they want to or like to, and that's it. Or they won't do something because "everyone will think something". It's very rare for them to be influenced by peer pressure, or conform to mainstream and be like everyone else, because there's no social benefit in doing so. Trying to be something you're not, simply doesn't work. It makes you blend in with the crowd better, but it doesn't make you feel any better internally. Introverts care more about the latter.