Probably worse, because at least there’s well established tooling for reverse engineering Windows binary drivers, allowing for someone to eventually write FOSS drivers.
I don't think it's worse because:
1) Wasm was designed to be easily decompilable / convertible to a text assembly representation by design, whereas for other platforms it requires fairly sophisticated disassemblers
2) Wasm can interact with the outside world (any I/O) only via explicitly defined import points, which are easy to intercept and/or replicate even if you don't know what's inside the binary itself.
