My point of view.
According to game theory, vested interests will strive to maintain the security of the network, whether it is a mining pool or a small miner, so the security of the two is equivalent.
From a practical point of view, if someone wants to maliciously damage the network, attacking the mining pool may be easier than attacking more scattered miners.
In addition, decentralization is more fair to miners, but the operation and maintenance costs of miners may be slightly higher than mine pools.
Scattering may be more conducive to scenes with higher fairness requirements such as random number, election, etc.