Electro mechanical connection requires springiness action to be reliable - one side of the connector needs to work pushing pins together. In full size and mini USB elastic pins are inside sockets, plugs have rigid contacts

http://www.hobbytronics.co.uk/image/cache/data/rapid/mini-us...

Micro swaps that around, moving prone to failure (bend/pushed pin etc) elements into the cable.

The photo below "Micro USB" is not Micro USB. The connector shown there looks more like a USB Mini-A socket.

A real USB Micro socket looks like this: https://cf.ydcdn.net/latest/images/computer/_MICUSB.GIF

That is not a micro USB socket shown in the picture

The receptacle shown above "Micro USB" is incorrect; it's a Mini-AB receptacle.