Agree.
Building a hypersonic tunnel is the easy bit.
Using it to find materials that can withstand hypersonic flight, designing engines that can transition to and sustain prolonged Mach five plus speeds, designing a vehicle that can be controlled effectively at those speeds, guiding it effectively and to target, then doing it all repeatedly and reliably - a lot more difficult.
Despite Chinese and Russian boasts, threats and parading of so-called operational weapons, I'd wager the Yanks still have the lead in hypersonics.