Matic is not an L2 though, it is a side chain. The reason L2s like optimism are exciting is because they inherit the security of ethereum mainnet. (matic has its own consensus mechanisms).

Matic Polygon is a L2 aggregator. https://www.coindesk.com/matic-network-polygon-targets-ether...

Optimism also isn't rent seeking with their own coin. All gas is still paid in ETH.

I would call L2 coins rent seekers. Reducing gas,increasing thruput among other things

Exactly, it's a money grab. Optimism doesn't have a coin and have no plans to create one. ETH is be the only way to pay for gas on their rollup just as is the case on L1.

sorry, typo. I don't view matic as rent seekers. The opposite of your view.