We never said there could be data loss with a software reset.
We DID say that a software reset could in a lot of cases be totally useless because if you need to reset your Tablo, communication between the Tablo and your device could be broken or the Tablo itself could be in a state that would be non-responsive. This would effectively create a button that does nothing.
And we also did say that a power pull (vs. a reset) could potentially cause data problems because Tablo wouldn’t have the opportunity to run through its shutdown processes.