Mining is open for everyone, so it isn't about what we think is better, some pools will definitely generate more hashrate than others and if one doesn't think that's right, the only thing you can do is to join/support smaller pools if you indeed have the resources to do so. These pools with higher hashrates aren't going to attack the network or anything, and that's because they stand more to gain if they use their computational power to look for blocks that to attempt an attack. Having said that, miners are definitely going to pull out of any pool that turns malicious and they are going to lose most of their hashrate, so there's prolly nothing to worry about.