what kind of benefit?

I'll have to remind privacy concern is also valid reason to run full node. For example, you don't want random electrum server know list of address belong to same person.

its also not relying on one source supply of balance accounting
imagine if a litewallet didnt tell you a payment arrived at your address. reliance on a litewallet means you only know what they choose to tell you.
they can send you a tx, say its confirmed. but the utxo does not taint/track back to any coin mined nor any real coin existing on a blockchain. should they go down a deceitful route

running a full node means you get to see it all and know all coins have a track/taint back to their origins of creation(coinbase reward) that validates that all coins are real coins and not ghost coins made up

yes not everyone needs to know everything. but if your receiving regular payment from alot of random people.. just seeing a tx designated for you is not enough, you will want to ensure it is confirmed and has valid funding before releasing your part of the deal, 
because the more payments you receive the more risk of abuse if you did operate without a non independent checking method