Display MoreI still think that is too strong but it depends what, as a guitarist, you want to do ( blimey this is getting very philosophical !).
I'm not regularly writing my own music. I'm too old to become famous and I'd rather play in front of large crowds playing other peoples music than struggle with my own music. I get very little satisfaction creating something that few people listen to. Yes cynical but I think realistic. Music is a hobby I have to relax
Regardless to be able to play well, its not necessary to know theory as Tab and explanation videos exist and you can use your ears to both work things out and play around/improvise.
Now what I TOTALLY agree with is that theory and fret board knowledge (which I think goes well together) opens up options, choice, creativity and definitely makes you a more complete guitarist. So its not mandatory for any guitarist BUT its highly beneficial. The exception I think would be session work where the lack of theory but also sight reading I imagine would be highly restrictive in that context.
Yes, this is getting philosophical and off the topic. Sorry to the OP for that. I don't want to derail it any further. It seems this discussion comes down to what we each consider to be an accomplished guitarist. There are certainly exceptions to every rule. Musical savant comes to mind. The human brain is certainly interesting.