This is chicken and egg problem. Companies that develop privacy-oriented devices have to sell very experimental devices for premium price because they neither have production batches large enough to bring price down nor they have enough money to invest into UX. So they can never appeal to mass market.
There is already a company selling desktop hardware that is closest to being backdoor-free [1], there is a phone with isolated baseband [2] and even some experiments with ARM-based laptops [3]. And actually many more examples can be found around internet, but they not going to magically release Apple-grade product.
[1] Talos: https://raptorcs.com/
[2] Librem 5: https://news.ycombinator.com/
[3] Pine64: https://pine64.org/