I don't believe you're a brewer unless you hand pull the water out of a well, grow and malt your own grain and hops, manage your own yeast cultures ... I'm kidding.
Seriously, EVERY brewer - including most pro's - chooses some parts of the process to outsource. Extract brewers have someone else mash for them, but all grain brewers have someone else malt grain for them. Malting was once an integral part of the brewing process. Some people manage their own yeast, most just buy vials or packets. And hops - where's the art if the package tells you the AA levels, etc. Or how about recipe formulation? So - don't sweat the a---oles.
So my point is - producing beer from raw ingredients is a multi-step process and deciding that ONE part is what makes you a brewer is bunk.
And I think most folks here would agree with this - Mashing is the 'sexy' part of brewing, but it's not the hard part, and it's not the most critical part. Fermentation control is the harder/critical part of making quality beer. When people want to go all-grain to improve their beer, I encourage them to look at improving yeast health and fermentation control (temperatures) first. That will provide a lot more benefit (though I don't know if anyone ever listens).