Exactly. Sometimes you'll hear a soloist that has gone to this before they really got staying within the chord structure down well. They tend to only play outside, because that's what they do best.

IMO.. to successfully play outside (ie: play anything that is still connected to the flow of your solo and the song being played), you have to be as convicted of your melodies as when you play inside. You have to know how it will sound and how to get back. This really requires a thorough knowledge of harmony. . knowing the "rules" so that you can bend them with taste and subtlety. for example, you can do so much with just the circle of fifths- using V-I relationships. if that's what you're trying to do. maybe your vibe is something else. Some cats like to play out because they can.. I like to think about staying true to the musical flow of melodies and true to the song I'm playing.