Apple intentionally builds their keyboards in such a way that it is incredible difficult to replace, the amount of skilled labor required doesn't make it profitable to just replace the keyboard. Its eye opening seeing a keyboard replacement being performed: https://youtu.be/4KuVvb9DTaU?t=309

Who is to blame for letting it get so far? I think its not just Apples fault, its governments fault not regulating them and consumers fault for still buying and even defending their practices (which you can very well observe in this thread).