I think putting it on the owners is just wishful thinking, kicking the can down the road.
NASCAR owns the product and should have the greatest interest in maintaining credibility. They need to step up with an immediate ruling when this kind of thing happens.
When it is a flagrant attempt to knock the lead car out of the way, there should be a costly penalty; it needs to be harsh enough to send a message.
Watching a second-place car setting up a clean pass on the leader is a great thing to watch, but it feels like a lost art. Bulldozing the leader on a late-race restart has become commonplace.