I don’t think too many people care out of compassion for individual Afghans, but the original reason we “liberated“ them was because the Taliban was providing a safe haven for Al Qaeda to train and launch terrorist attacks. The USA created a democratic government in the hopes that the troops could be withdrawn and the local Afghan government would maintain its own affairs and keep terrorists from operating in its country. There are many Americans that care that after 20 years the Taliban will take over again shortly after the troops are gone. Nothing changed, the next OBL could be operating out of Afghanistan and Americans got nothing for their 20 years of wasted tax money except thousands of casualties and a lot of broken families.
So I don’t know if too many Americans care exactly which government Afghanistan adopts, but I’m pretty sure anyone paying attention is disappointed that they didn’t get literally anything different.
Edit: to be clear, this wasn't me critiquing the plan, saying whether it would or wouldn't work. This was me responding to GP's prompt about whether America cared about what style of government Afghanistan adopted. Yes America cares, not so much about the style of government but about the outcome. They were told that Afghanistan was going to get a new government that wouldn't allow terrorists free reign to operate as they please; as a result America and the world would be safer. They didn't get that. Yes there are other places that terrorists could operate from, but removing Afghanistan from the list would have been nice. Yes, democracy would be nice, but America would have accepted if Afghanistan had adopted a limited monarchy ran by a Grand Poobah. What we're about to end up with is the Taliban running the government again and probably handing a few of the recently vacated facilities to terrorists as new training camps.