However, this was partially addressed in the article. Phones (if students have them) have apps which make solving the math problems too easy, scan the problem and the steps and solution are displayed. So teachers can't permit them in the classroom if they eliminate the learning objective entirely.
With regard to computers, though, Desmos [0] was spoken of in the article. They have apps for computers and phones, and they've made some headway with making the computer program available when students have mandatory tests that are already on computers.
I don't think your judgement really makes sense, the education system is adapting. But it's a long process and the problem still remains, if educational materials and curricula require the use of technology, and the teachers and students can't afford it, then it's still a failure or sets up classes of people to fail due to lack of economic viability.