As expected, my reply to him is that anything can happen to binance chain, hacks is more possible on alts and it's near impossible on Bitcoin network, but the desperation of avoiding high transaction fee is why people like him are looking for cheap way.
Let's take the hack risk aside. We are talking about some tokens that are under a different blockchain, which is not bitcoin, but pegged coins, be it bitcoin or fiat surfers of the same faith. We can't confirm if there is actually any real bitcoin backing those shitcoins anywhere as there is no transparent report that they give about their reserves with respect to their pegged coins.
Another risk you are to think about aside from the hack is this: what if something happens to Binance as a whole? Do you think it's a native token or any coin that is being minted by them? Everything will crash, even if it recovers. It will take a lot of time. And again, when you swap over to the altcoin that they claim to be bitcoin, you are also not in control of the coin that you are holding as they are centralised and can be frozen in your wallet anytime, even if you move them out of the centralised exchange.
So when thinking about the possible ways to go about low fees, we should also consider the privacy and security measures that come with them. So we should always give those who seek alternatives what it will cost them for whatever option they choose to go with; zero fees are not the only thing to worry about.