Yeah, I totally hate HDMI cables too, they suck! So what if I can get pure digital HD video and audio on the same tiny cable, as opposed to the five required for component (with stereo sound and lesser vidoe quality). I just hate having to actually look at the cable and port I'm trying to plug it into: I'd much rather just jab them together blindly until it goes in!
Nice attempt at sarcasm, but you missed the point. People want 'everything'. I'd say that I've plugged more cables in under less than ideal circumstances than with a good view of what I'm trying to plug in - such as into the back of a computer when I can't see the back, less than ideal lighting, odd angles, etc.. Having a cable where I don't have to worry about orientation makes it so much easier. Component video is less than ideal because you still need 3-5 cables plugged into the correct spots.
Roughly speaking, the question might be WHY is HDMI only orientable in two ways? Could they have made it so it's reversible without sacrificing any utility?
Heck, consider the bandwidth available from coax. Why do we need all those wires, because it's cheaper?
Well, I suspect it would have something to do with keeping to a standard pinout. Yes, they probably could have made HDMI a fully x/y mirrored plug, but probably at the cost of doubling the number of power and data connectors, hence doubling the connector and socket thickness or length...while knowing full well that one set of contacts will be idle every time the cable is plugged in. Apparently apple gets around this by using both serial data paths at the same time, but the HDMI standard needed a bit simpler connection: it didn't have the equivalent of a desktop computer's processing power on either end to handle variable serial data streams across one set of contacts. Note that I said didn't: with the rise of smarter and smarter devices, it's entirely possible that now it does have that brains on either end...but we do have to pick a system and go with it, and the one that works with the widest array of devices will ultimately win in the end.
From an engineering and materials efficiency point of view, having uni-directional plugs is simply an accepted standard. Other than audio and component video cables (and that little apple plug, of course), what else is omni-directional? (Okay, the lightning plug is only bi-directional, but you know what I mean) Hard drive connectors (sata and IDE), all of the power connectors in your computer, 120V plugs, 20A plugs, USB cables, thumb drives, etc, etc, they only go into the socket one way: if you force it you break it. At least micro-usb has those little springy things on the bottom: I can feel them with a finger, figure out the orientation and plug in my phone in the dark, no problem. If it were a USB-A plug, I might be cursing a bit...