This is definitely a question that has to be answered whether musically or philosophically.
You see, you are never going to be able to see the benefits and faults in things that you simply ignore or cast aside. If you spend you're life ignoring what other people are doing, chances are you aren't going to turn out like other people; however if you observe what they're doing then you can make an educated decision whether to be like them or not.
I'm not like most other people for two reasons: firstly I'm autistic and I'm not the least bit ashamed of it, secondly I have seen how easily other people around me can be ground to a halt by things that seem very easily overcome to me, so I don't follow the crowd. I don't force my opinion on anyone because I believe it's everybody's right to do what they want with their lives. I was able to decide not to follow the crowd and to decide to become a guitarist because I learned what was entailed and what the consequences and benefits of my actions would be.
Musically; all the great guitarists have about a million tricks up their sleeves. This is not the result of them playing the same lick over and over, but the result of them constantly experimenting with different styles. Jeff Beck has inspired Jimmy Page since the 60s and has played everything from heavy rock to tech-no to jazz to hillbilly, and all at the same time. Looking at everything gives you the option of ignoring what you don't like and using the bits that you do like. Simply not listening to anything other than one single direction is completely your choice, but in my opinion is a recipe for disaster for a guitarist. I listen to rock all the time, but everything from Satriani to B.B.king to Iron Maiden and Def Leppard to Deep Purple and Led Zeppelin to The Answer and Dream Theater to Thin Lizzy.
Simply put, be yourself, and use everything you can find around you to make yourself into the guitarist you want to be. Have the knowledge of a classical composer, the spontaneity of a jazz virtuoso, the emotion of a blues master, the flair of a rock axewielder and the presence of a metal-monster.