Maybe because IOS isn't open source, so no one can prove anything about the way the OS was throttled, and certainly no one can prove the reason why - but of course it's all a bit suspicious when Apple denied it, then ended up admitting it when the pressure mounted. Your anecdotal evidence counts for nothing unfortunately.No one turned up evidence that they were arbitrarily nobbling peoples devices for any other reason.
For a software engineer you're not making a whole lot of sense.
By the way, I'm a former programmer, I then transitioned into IT consultancy and run my own business, and now have career experience in excess of 25 years, so your 10 years of embedded design and software engineering are relatively unimpressive to me. It certainly doesn't make me think you're more qualified than I am, with what are simply your points of view. That's all they are.
I have a point of view, you have one too. Let's leave it at that.