You're comparing apples to benches. Photoshop is incredibly limited in scope compared to Maya. It is a much simpler piece of software with a much smaller dev team. Those 3 programs are for similar purposes and their development teams overlap. They're for 2D artwork creation.
Maya deals with animation, 3D modeling, 3D rendering, particle simulation, hair simulation, texture baking, sculpting, procedural generation of 2D, 3D and general functionality, various film related VFX, and much more. It is a software package that spans a very large amount of industries and the development team has to do a lot to support and cater to those industries. The price tag is more than acceptable for professional grade software like that.