"Why don't we see more green smites? Simple it's not glamorous. People want more damage. This is the equivalent of buying the long sword instead of 6 wards."
This is a really unfair assessment of the situation designed to make it seem that it is never acceptable to purchase any smite other than the warding smite and to portray yourself as the one sensible person in a sea of idiots. The situation with smites is nowhere near as clear cut as you are suggesting, and motivation for foregoing green smite can be numerous reasons beyond "I want more damage". Going for the "lol people just want their damages" explanation is really lazy and makes you look like a tool.
Even in competitive play, green smite is nowhere near 100% pick rate and it is NOT essential to purchase Sightstone on a jungler using either red or blue smite. You have gone so far away from the "lol what's vision" end of the spectrum that you are valuing vision far too much, to the point where you assume it automatically is the optimal choice in every situation regardless of opportunity cost. That's not the case.
It's a strategic choice, the smite system as a whole is. I really really like green smite, as it allows me to gain a huge amount of vision control combined with red trinket and allows me to give my laners a bit more safety. On the other hand, red smite gives me added safety from being picked off, gives me greater invade potential on the enemy jungler and increases my ability to pull off successful ganks as it significantly lowers the damage I'm likely to take and helps me finish people off. Blue makes it much harder to kite me, makes it easier for me to kite enemies and adds a little bit of extra damage to my champion when that's needed.
Every smite is great and they all do really unique, powerful things. Green makes your ability to control objectives better, gives your laners more safety to be aggressive and indirectly allows you to gank more productively (because it allows you to sweep before ganks). Red smite gives you increased safety in the jungle and gives you more snowball options (increased chance of killing the enemy jungler and killing in ganks). Blue smite has too many potential uses in fights to list.
Your post is just really rude as a whole and if you really think smite choice is as obvious as you seem to, you're dumb as well as rude.