Earlier quoted context omitted.
The problem is that the end user is not the customer here, so the perception of their brand in the users eyes is nowhere near as important as the ROI they can deliver for the bundleware vendors. Think of it like the IRS, they don't increase the tax take by being nice to people.
So who cares about their image then? The original software vendor, probably. If they bundle crap with your install then take it up with them. If enough people did then they would probably stop using this company. So it all comes back to them eventually. Even if it's not in a negative PR way.
They care about their bottom line over their image, or they wouldn't get in with the toolbars.