@liw Stating the obvious: the question is vague, though one suspects that the point is to answer in a way that both addresses the question and presumes the question's framing.

That said, applying my #manifestation frame, usability is a manifest, immediate, percievable, clear attribute, whilst security is a covert, latent, emergent, and obscure attribute.

In mass markets, immediacy takes precedence. At least until emergent benefits become realised. Though often only for as long as those rapidly-fading memories persist.