For now we don't see any harm of repeatedly using the same address but will we wait before something bad happens to us? I don't think he is misleading since he already state some reasons there on why it is advised to constantly change our public address right after every use however for someone that is only dealing with smaller amounts then I think they can continue using with one address.

There's nothing to be afraid of because no one will check their addresses and will be obsessed to hacked it. Hacking isn't easy so if hackers will done the act, they can just do it to the addresses that has huge balances on it as that will be worth of their time.