Yes. Cause it's in the Constitution.
So are you saying the income tax is good because it's an amendment? How bout prohibition?
Prohibition was repealed.
The entire premise of libertarianism rests on the Constitution, because it provides the basis for what the government should do. And if at any time, later generations thought that the Constitution should be changed, they could. And in this case, they did.
This is the law. This is the law set out by the Constitution which guides our executive, our legislature, and our courts. It does not matter if it is a bad law, it is in the Constitution, therefore it must be followed. So, therefore senators should be elected by the people, cause that is what the Constitution calls for. If the public thinks it's a bad law, popular pressure will see that the 17th amendment will be overridden, like Prohibition.