Robin
I would add a third reason to why I think people dont like dropped kerbs.
3. They tend to waste parking space.

I have three houses opposite me where without dropped kerbs you would be able to park 6 cars but currently you can only park 3.
Two of the houses have small driveways and the third has a concrete garden. House number one doesn't have a car. House number 2 parks his car on the road as it takes him a few minutes with assistance to park his car in the driveway and the third can grow 2 cars in their garden but leaves it barren.

I am not saying this is the case with all people who have dropped kerbs but it illustrates the waste. Many of the driveways have not been used for 10 or 20 years. They are too small to accomodate modern cars and are overgrown. It would be good to see these recycled from concrete back to fertile ground.