I'm a professional locksmith. There is no fucking way most people would know how to begin picking a lock (and I say that without trying to sound like some pedant to my trade.) The finesse and understanding of pin/wafer tumblers, the differences in eastern and western variants, what proper pick to use, or especially how to crack archaic locks from Asia back in the day that had unconventional design.
I've always liked picking the Thief class. Retard purists who think that someone like Conan should be able to charm a lock as readily or quickly and professionally as Locke Lamora just because they are both adventurers don't understand shit. Me and car mechanics are both blue-collar workers. I sure as fuck wouldn't know how to do their trade, even tho I know how to change a tire and adjust a carburetor.
I'm ok with simple skillsets. LotFP did a great job at having enough to create a unique character as a Specialist (thief, spy, gadgeteer, acrobat etc.) while still showing that the basic classes have obvious niches.