And indeed that's one reason (of many) I don't like to write checks. But I'd still argue that the threat model from giving a physical check to someone you know or do business with is different from linking your bank account with some online service like Venmo, where any mass breach or vulnerability might result in a wide array of people now having access to my banking information. And even if my bank covers me in the case of fraud, they don't compensate me for the domino effect problems that can come from having bill payments bounce because the account was emptied.
To be clear I'm not arguing that this is a good system, but as long as it is the system we have, it's wise to limit who you give your banking account information to, regardless of channel.
