Matic/Polygon is not pushing towards decentralization.
They ‘ride’ the trend of having their own blockchain which runs Ethereum software.
The current Etereum POW/proof of work based mainnet grew too large in size and squeezes very high transactions fees.
The proposed transition to a POS/proof of stake based Ethereum may not materialize or if it materializes it will fracture Ethereum in 1 POW chain + several POS chains.
Projects like Binance Smart Chain, Polygon and our ‘Decentralized web’ project did realize this awhile ago and do run an independent / owned Ethereum blockchain instance.
If a project wants to avoid ‘paying rent’ to other blockchains for their transactions they can consider the solution of an independent / owned Ethereum blockchain instance.