you should but you don't - I proven it over and over again with solo mining certain coins.
I cleaned up on Neutrino a few week ago solo mining it before the world discovered it.
If you take all the biggest multi pool and add up their doge hash they only account for about 30 to 40% of the total network hash for Doge - wonder where the rest of the Doge hash is coming from?
big farms solo mining the coin...
I know it for a fact. I have a friend with 8 GH that only mines Doge and he mines Solo...
plus some of the pool operators skim blocks for themselves. I caught one cheating last month grabbing random blocks off of hash I was contributing to. In Mpos it only take a few lines of code. I caught the pool operator by looking at the block chain and found his wallet address for blocks I had found in his pool. the pool was cleaning up... I mean it had over 90% of the network has for a coin and was getting nearly every block so I looked at the blocks that the pool did not find and discovered a few of them were still going to the same address but did not show up in the list of blocks found by the pool. Busted....
I basically do not trust pool operators.