That’s fine. Let them fight their civil war. The problem is long-range precision warfare extending past their costs. Knocking out that capability doesn’t require boots on the ground.
Also, this move is making the Houthis immensely popular: they are winning the PR war internally right now.
As I mentioned elsewhere [1], this is fine. A stable, adversarial Yemen is better than the clusterfuck it currently is. A big part of the problem with the current situation is there is nobody to negotiate with who can credibly claim to control these armed factions.