Its very true that we do not see a lot of great mercury's. Its starved by 1 planet, moon, so thats 3 in 12 charts about, a bit less cuase in some charts moon will starve it badly but it will be in cancer. Its delighted by Venus, venus can never aspect, but i can join, but it has two signs to delight mercury in, so thats about 3 in 12, evens out the score with moon. Then saturn will starve in 1 in 12 charts. Sun will delight in 1 out of 12 charts when mercury is in leo, and it will agitate and delight in 1 out of 12 charts. So mercury is half a planet ahead on friendship vs starvation agitation. So no, we dont see a lot of great mercury's. And that shows, look at how may people find themselves struggling in wrong situations that were never properly examined?
Indeed, this is a primary lesson to be learnt!
Perhaps this is how universe lays the net to catch up on working out the bad karma otherwise who would want to get caught 😀