Article you posted hits the nail on the head:

" Ludos has designed the high-intensity interaction and high real-time requirements of the game scene. Therefore, the Ludos protocol adopts a highly decentralized PoW+PoS consensus backbone , with multiple independent consensus mechanisms and security levels. Game/function sidechains for throughput, data storage, and security and efficiency. The Ludos main chain will be mainly used for the deployment of side chain contracts, the issuance of digital assets, the settlement of transactions and the transfer of value, while the main chain can act as an arbiter of disputes to ensure that assets can be safely returned in the event of a malicious attack on the side chain. The execution of specific services (games, independent functions) is handed over to sidechain processing with higher throughput.!""

Extra security and flexibility are ensured with the emplyment of side chain technology.