not necessarily, this is a numbers game, the more players you have at the table, the better the odds of finding a block. If what you were saying were true it would make just as much sense to just mine solo vs mining here.
Not really.
30ph should earn 29.18 btc a day or 2.3344 blocks a day.
My 24th should earn .02335 btc a day or 0.001868 blocks a day that means if I solo mine it takes about 535 days to hit a block.
Big pools of 10% have less variance.
Little pools of 1% have more variance.
If all my wishes came true kano would be 8% of the network and have 107% lifetime luck.
We are now at 1.7% of the network with 103.75% lifetime luck.