Why are there so many standard?

Sometimes, I was sick of no standardisation in Industry communication system. There are so many standards to communicate between devices. No common standard is currently available. It look like a lot of people speaking different languages in same house.

TCP/IP is like English language. Now most of the device can communicate with TCP/IP. However, we need module to convert TCP/IP to other standard. It look like looking for translator wherever you go. The main problem is that it is expensive to implement TCP/IP communication on low-cost devices. RS-232, RS-422 and RS-485 are common but they are very slow compare to the current speed of processors and controllers. There are some standard like Profinet, DeviceNet, CAN (Controller Area Network) and ModBus but all devices cannot support all these standard. Some brand try to promote their proprietary standard but I think it is not easy for proprietary standard to outlaw open standard in Industry.

For me, I like TCP/IP. It is fast enough for systems those are presently available. It is also easy for me to find the info about TCP/IP.