Well, I consider the Lightning Network somewhat centralized simply because you're going to need to trust LN nodes on the network to route your payments. Not to mention, not everyone will be able to open/close channels on the network, allowing only banks and wealthy institutions to operate LN nodes. And if governments start to apply AML/KYC regulations to such nodes, then there would be no use for the Lightning Network since people would need to verify their ID to be able to use such feature.

Eventually, I believe that Bitcoin will become extremely centralized as people would prefer to transact on the Lightning Network (which is an off-chain solution) over the main chain. Then, there's the issue of miners where they won't be able to claim the block reward if people transact only on the LN, leaving the main chain behind. As such, with the Lightning Network, there would be no incentives for miners, further threatening the security of the Bitcoin network itself. Only time will tell whenever LN becomes successful or not.