Earlier quoted context omitted.
Drunk driving is already criminalized, generally socially unacceptable, and has received lots of attention over the decades. Vehicle size is a relevant factor in vehicle-pedestrian collisions regardless of the cause of the collision.
Alcohol is also a factor on the pedestrian side, not just the driver side. This has not been addressed. It is still a relevant factor on both sides. Yes, vehicle size/design is another factor.
What is there to address? Unless you enforce that people only drink in private homes there will always be pedestrians who've had a few. Walking is probably the safest mode of transportation when you're impaired.