WOW64 is a 64-bit "wrapper" for 32-bit processes. You can see this when you debug a WOW64 process in WinDbg[0]; so, the system is agnostic about it's "bitness" because it "appears" to be an x64 process but it's really 32-bit, just wrapped. Thus, the posit. :)

[0] - https://docs.microsoft.com/en-us/windows/desktop/WinProg64/d...