Should Tier 1 Auto Suppliers Blog?

At this point, I don't see why, but convince me otherwise. Here are a few of my reasons:

1. Their customers are too few. Suppliers talk to a fairly short list of engineering, planning and purchasing people. Traditional PR works better unless . . .
2. You're a massive supplier capable of actually affecting (i.e. have lots of $ to spend) consumer demand for a particular technology. ABS brakes, which were lobbied behind (and if front of) the scenes with NHTSA, and diesels (jury is still out, diesels are great but not inexpensive) are two that come to mind from Christmas Past and Present.
3. Unless you've got a highly differentiated product, and can hope to own a category like safety, fuel economy or in-car entertainment, you won't be able to convince enough consumers that your site is worth going to several times a week, or more.

Would love to hear what you think.