Seriously- what kind of people use, as a primary input into their purchasing decisions, whether they've heard the name?
Lots of people, you among them. It's not even a matter of "Well, there are 300 makers of this product with odd Chinese names, or LG. Hmmm- which to pick?", it's just getting the name out there at all so that you know they might be a supplier, especially if it's a new market. One of my employees sent me a note yesterday on a special type of active HDMI cable that might solve a problem we have right now. Are they the best? I don't know, but chances are I'll make note of the name when I'm doing a search for that type of cable. That tiny bit of brand recognition does make a difference, even if you think it doesn't.
I work pretty hard to keep ads out of my life, but I'm well aware they manage to affect me anyway.