The thing is, when they sell to a corporate this doesn't matter. The corporation just creates their own image and drops that on every machine as standard.
The next largest market is not us techies but Joe average. Now yes, they do make money by pre installing this crapware but it also gives them an advantage. On the packaging they can show off that their machine comes preinstalled with this large list of software (highlighting various well known names). Joe average will tend to make his purchasing decision based on which machine has the largest list of features and the biggest numbers (works the same for stereos, TV's, etc). That's why all this tech comes packed with useless features that more often than not reduce the experience and performance. If you want to outsell the competition, sadly, this approach works.
This is why this trend is not going to change anytime soon.
You can win by not taking this approach (and Apple is probably the best example of this) but your product has to be well polished and typically you will be aiming for the upper market who more often than not doesn't fall for these marketing tricks.