There will never be a Chinese hegemony. The actual decision is between US hegemony and a duopolar or multipolar world. The latter are pretty obviously preferable if you're not American or not very closely allied.
And as you say, it's good to be at the top.
It would be irrational of China's leadership to seek anything else.
To be the hegemon, you need to have a clear advantage over everyone else. China will never have that over the US+Europe. And by the time the US and Europe seriously decline, China will start declining too.
China's leadership would be foolish to seek hegemony. It's just not feasible short of the US going into a civil war, and if you come at the king, you best not miss. Becoming a second king yourself instead of trying to take his place is much less risky and has most of the same rewards.
Another way to look at it is that China will never have the same advantage over the US as the US gained over the UK before taking the lead. The US passed the British in economy and population much before it became the hegemon. You need more than an advantage in prosperity.
You're also missing the long game of China. Probably on our lifetimes the economic focus of the world is going to move to Asia and Africa based on opportunity of growth and demographics, looking from this perspective why would they care about conquering the west when they can just position themselves very well for the long term and have a nice view watching the decline of the west society?
The economic focus in the world moved to the US for about 70 years before the US gained hegemony.
You can be number one without being the hegemon.
"never" is a strong word here.
Tech and military wise they're catching up really fast. They have a much fitter and controlled population. Their economy is doing real good, they're spreading their influence over Africa, &c.
The US is crumbling on virtually every aspect, Europe isn't doing much better, if China and the US stays on their respective courses your "never" will be more like "in 50-100 years".