A short distance on the screen may still mean station choice, luggage drag, queues, park shuttles, and arrival fatigue.

Research is easy. Route judgement is the hard part.
You can absolutely plan China yourself. The reason a route verdict still helps is that beautiful places are easy to find, but realistic pacing, transfer logic, scenic protection, and traveler comfort are much easier to misjudge.
The issue is not a lack of information.
The issue is choosing what to keep, what to cut, and what belongs in this trip instead of the next one. That is the part a route verdict is supposed to help with.
A mountain or scenic detour often fails not because it is unworthy, but because the route gives it no weather or energy margin.
A route that works for fit adults can become the wrong route for parents, children, seniors, or nervous first-timers.
Payments, trains, ticketing, language, and first-day orientation still change how easy the trip feels.
Can I fit more famous places into this trip?
What route shape gives the best version of China for these days and this traveler?
Send the route you built yourself and let us test what could break first.
The first verdict should tell you whether the route is calm enough to keep, which scenic detour is too ambitious, and what should change before you book.