Why can't you make a spherical lander? With some moving masses on the inside to roll around? (Clearly I'm not an engineer)
https://www.space.com/jaxa-slim-moon-lander-lev-2-ball-robot
There's also the method of dropping a ball of airbags that deflate and detach, so you aren't limited to being a ball.
I assume it's more efficient and versatile (lots of tools on these things) to not be a ball.
You basically want a small truck loaded with equipment and a solar panel on top.
I guess the concept would be to surround the motors in a electrostatic force that results in propulsive removal of particulates away from the drivetrain.
I don't know if it has been practically used.
For example, at some point you need to be in the right position for your communication and power needs. The payloads need to handle rolling around. Lots of reasons.
Its a very invasive solution for one particular problem but doesn't help and makes other things harder. If you don't slow down, being round want help you when splatting on the ground.
At the end of the day, we can make landing of the moon reliable with other methods that are less invasive and thus less costly. The solution you suggest is one that you use if you don't have any good options left.