I tend to suspect you're right about this being a case of malicious laziness. Once the engineers started protesting, middle management decided it was easier to feign ignorance of the problem and push on than to come up with a more legitimate value-add. Laziness-driven, but (I suspect) also entirely malicious in the sense that if you had given anyone in the room a choice between receiving a laptop with their crapware and a laptop without, they would have chosen the latter without the slightest bit of hesitation.

Then again, I may be underestimating management's ability to drink their own kool-aid.