Anyone can pull the wool over my eyes when it comes to computers because it's a foreign language to me.
Ask me to manufacture absolutely anything out of most types of metal, ie. spring steel, mild steel, cast iron, stainless steel, copper, brass, aluminium or weld by means of TIG, MIG, MMA or gas....easy as pie. I could pull the wool over most peoples eyes when it comes to metalsmithing.
That's the reason we pay extra for services, tradesmen, because we all lack the knowledge to do everything ourselves. That's also a reason why a lot of customers prefer to find a suitable service/tradesman in any field and stick with them out of trust.