The T2 chip is absolutely essential to modern data security. It’s a similar, but much more advanced, version of what Chromebooks do to provide some semblance of broader system-wide protection. Interfering with I/O, at least in a hopefully transparent manner, is entirely the point. While no system can be totally secure, these chips go a long, and very important way, towards defeating what are increasingly common and feasible attacks. I’m 100% on the side of Apple in this regard: while the road to transparent security is difficult, they’re totally heading in the right direction by trying. I don’t think people really understand exactly how vulnerable almost any system is today to a huge variety of stealth firmware insertions, and how close we are to seeing widespread, untargeted, mass use of such attacks. Apple is trying to take a lead in this regards, and it’s actually for me a big selling point of their hardware and one of the reasons I won’t consider much else out there. Nobody else has shown both the political will nor the technical chops to pull this off at such a system level, not even Google - the Chromebooks are laughably limited in what they can do, in order to fit under the protective umbrella of their secured firmware. Apple’s computers are trying as hard as possible to provide not only greater security, but to do so seamlessly to the total user experience. Sure there are some compromises, but that’s the tradeoff of security at all.
Count me 100% on Apple’s side on this one - data security is only going to be more and more personally important in the decades ahead.