Meanwhile back on Planet Earth .....
Going by your argument you should not own any electronic device.
Because you should not be trusting Intel/AMD to make your CPU because they might have put spyware in it ....
Because you should not trust your keyboard manufacturer because they might have embedded a keylogger in it....
Because you should not trust your choice of OS because you haven't personally reviewed 100% of the source code and all subsequent patches for spyware ...
In the end, its about balancing risk vs reward. And frankly, especially in terms of privacy, Apple are far more trustworthy than the vast majority of other options out there.