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Currently I do not see any advantage to do KYC, the idea of this is decentralization and maintain anonymity, the tendency of governments and banks has always been to end anonymity for them to have control.
The only advantage of KYC that I see is for the ICO, IEO projects, which is taken as a protection measure to avoid scams that have fallen so much some investors, however there is the latent risk of using that data for other purposes or worse still sell them .
Have advantage by doing KYC becuase we can withdraw our assets on exchange market with higher amount, without KYC only available withdraw 2 btc in daily with Binance exchange market, for airdrop maybe not advantage because airdrop coin is not worth with higher price, just waste your time and your data account submit on airdrop project.
In all exchange it always required KYC verification if you want to withdraw huge amount of money. Most of the trusted and good exchange always have KYC just like what you have mention which is binance exchange. But, for me maybe having KYC also have disadvantages like once your personal information got leaked in the public. There are many big time people in the field of cryptocurrency and most of them do not want to reveal themself because they want privacy and they do not want to expose their identity. Do not ever do KYC procedure in any website that not trusted because they might use it in any illegal activity.