For the personal accountability perspective, I would say it applies even more, since there are no requirements at all for walking into a casino and burning up $100k, yet we don't blame the casinos, we blame the person burning the money.
For the perspective that Robinhood owns his risk somehow, from not following their suitability guidelines, I'm not familiar with any of this so can't speak about it. Naively reading this, it appears to be extremely open ended, requiring a consistent internal process for approval, along with a warning, rather than anything specific.