Because mobile websites are designed to have a reduced set of features. Why would a company spend thousands or millions to produce a mobile website that functioned EXACTLY like the full featured version? They wouldn't; they would just show you the full featured version on the mobile phone (as many sites already do). The problem here is that companys build a shitty ass mobile site and then force you to use it when they detect you're surfing from a mobile device.
If you want a full featured web experience on a mobile platform, get the Dolphin browser and set it to "desktop" mode.
You and I are in nearly identical scenarios. I bought a Galaxy Note 3 and Galaxy Gear watch together. I agree with everything you've said, and I also run my own exchange server. To build on your helpful assessment of Galaxy Gear (on of the only helpful ones here), and to give other people an idea of how the device is helpful, I'd like to add:
The device is extremely convenient in settings where having your phone out is considered rude. This is because you can continue to stay informed by using the watch without giving the appearance that you're playing/working on your phone. This is great for meetings or conferences, dinner with the wife/girlfriend, college classes, etc. As a motorcycle rider, I can tell that I will never go without a smartwatch again. It is much faster and safer to check messages, make/answer calls, and check notifications from the watch rather than taking my riding gloves off, pulling the phone out of a zipped pocket. You can safely stay informed while you ride by glancing at the notifications on your wrist. I no longer have to stop what I am doing at home/work and go pickup my phone off the charger/desk. I can answer calls, and respond to text messages without going to get my phone. As somebody that works full time for the state, runs a part time consulting business, goes to college part time, and runs a household filled with a woman and children, I can tell that TIME IS PRECIOUS to me, and the smart watch is a huge time saver.
I think most of the smart watch haters here either can't afford the $300 convenience fee for the device, or they are disappointed by the lack of "...sunshine up their butts." as you said.
Suggest you just sit there and wait till life gets easier.