What else did they expect to happen?
The original reasoning given was a concern that cyclists on the steep section of Drum Brae would be injured if they collide with a bollard after swerving to avoid someone reversing out of a driveway. Whilst that doesn't sound fun, the idea that swerving into the general traffic lane (in the absence of bollards) would be safer is one I don't understand.
As far as I can tell, people driving in them (illegally) was also the desired outcome. Following the decision to remove the defenders, Lothian Buses said "we want to drive in that mandatory cycle lane, please hurry up and remove the lane defenders", and the council said "OK, ASAP".