It's not the Plaid "conspiracy" or "privacy" that's the issue, it's that they require your bank credentials, which means they (or if someone hacks them) can move money in and out of your bank at will (as well as perform anything your online banking allows). And they know those credentials in a plaintext matter (it may be transmitted to them via an encrypted connection, but in the end they have plaintext access to it, given they have to enter it into your bank system in the same way). It's better that they have since switched to OAuth for some banks, but for banks that they don't have OAuth for yet, it should be pretty obvious why it's a bad idea.Anyone who is afraid of this is naive in the assumption that they had any privacy in the first place. This is about emotional and psychological results, not actual privacy or security.
Did you really think you would be the first victim of the Plaid conspiracy to do something other to earn profit?