We created TON Access by learning from the failings of Ethereum. Most EVM dapps access the chain through Infura, a centralized business. By depending on Orbs validators, we can guarantee decentralized access, similar to what pokt.network is doing on EVM.
RPC gateways like toncenter throttle anonymous users to 1 request per second. Most dapps cannot operate under these restrictions since their users are anonymous.