Once upon a time every erc20 token was a scam, that was the way of newbies that came into crypto space in 2018 ( bear market ) they probably make one or two investments that doesn't do so well as they hoped for, I wouldn't have made my 12,000$ in 2021 if I believed that all BSC projects are scam...learn to do research first before saying such statement.
It means that you have learned a lot about everything in the past and also in the present because the ERC-20 token in 2018 is a trash token which will eventually become a scam and the BSC token whose owner is not clear will also become a scam in the end so it is actually already almost similar to the past although you are late to realize it now.
There's so much more in crypto and learning everything here can take time but the guy already has some experience in the past because he did not believe in the claim that all erc20 are a scam. It is like they are saying that all cryptocurrencies are a scam or btc is a scam but of course, that is not true, and indeed that only a newbie person will have this mindset.
2018 can be called a bear season and the majority of the coins have fallen, this can give others a false impression that all erc20 coins on that year are trash but few have survived and they are now stronger but we didn't notice it because most people now focus on BSC tokens.