There is much to tell about Machu Picchu. Although the ruins are indeed breathtaking, fascinating, the experience itself is strongly touristic. To take the bus to the site, you have to stand in a huge queue, which nevertheless moves quickly. Once at the site, you have to struggle to find a window without other tourists behind you, the area being extremely crowded even in the early hours of the morning.
They are two different aspects, yes the ruins are extraordinary and there is nothing inferior to the pictures, but the tourist experience is one of a dozen.
As I wrote before, some people have a projection very different from the historical truth about South American civilizations, including the Inca. Some yes, they are shrouded in strong mystery, being very old, as we later found out in Caral. But Inca is neither old nor lost nor so mysterious. Not to be confused with the Maya, the Olmecs or the Caral culture. The history of the Inca is quite well known, the Inca being the name of those who conquered this area, subjugating the tribes in the area to be conquered by the Spanish conquistadors who took advantage of the differences and dissensions between the populations of the new empire.
All I can say about Machu Picchu is that it is impressive. Let the pictures speak for themselves.