So you expect to get called by worse?
I would also bet a hand without SD value.
Edit: Don't make assumptions unless you have a very good reason. Villain has a hand with SD value that he may or may not turn into a bluff. We have a looooot of air in our range given how the hand played. In this spot you want to be able to bluff as much as possible. If villain folds great.. bluff more in the future.. if villain calls with worse.. great.. he has now seen that you have a wide range of hands with SD value putting the BTM of his range under max pressure. If he calls with a better hand.. we will be more happy to XC turns vs him in equivalent situations in the future.
You mentioned yourself that we "should turn our hand into a bluff" - which means no worse hands are calling.
All that said, I´m by far not a big fan of putting common terms like "bluffing" / "valuebetting" in question, although it seems to be quite "modern" or innovative nowadays to throw everything out of the window. The terms are pretty clearly (and correctly) defined in my eyes - the only thing might be that the situation is not as clear ... but that does not disqualify the words themselves.
What I mean by turning hand into bluff means we have less than 50% equity, but not 0 equity vs a calling range. Seems like bluff and value are not very well defined terms.