Here's the thing I think you're missing.
A lot of non-MMO-only PC gamers have that prowess. That's part of why they're PC gamers. Being a PC gamer you will eventually come across the modding culture and you will likely learn from it. Plus because a lot of it is community-based, people will want to help you. I remember playing Mechwarrior 4: Mercenaries where players would practically bend over backwards to help someone install the latest Mektek patch. When it comes to modding, you're almost never alone because usually someone else out there is thinking the same thing you are.
So maybe you don't know how to do certain things initially (I wasn't born with omniscience) but one of the joys of being a PC gamer is gaining that extra level of understanding yourself and with the help of others.
And that's just one side benefit of PC gaming. A lot of games are setup to where you don't have to do anything but toss the mods in or run an .exe (see Neverwinter Nights CEP or PRC) to get everything working. Adding new maps to an FPS. That's where a lot of people start. Something small, something easy, something they see a lot of benefits from without any effort.
When it comes to console gaming, you take away from it only what the developers intended.
When it comes to PC gaming, you take away what you're willing to put in. The more effort you put in and the more you experiment the more rewarding it gets.







