I think people are getting on you because of you use of the term semi-bluff.

Bluff - A play with zero equity or minimal equity to get hands better than ours to fold.

Semi-Bluff - A play with good equity to very good equity to get hands better than ours to fold.

Spew - A play in which no better hands will fold.

You are claiming to be semi-bluffing simply because you should in theory have good equity here vs his range (which is true), but this is just a spot where almost no better hands are folding. So you're claiming semi-bluff while other ppl are claiming it's spew.