Pulling works the upper chest, pushing the lower, in exactly the same way incline/decline bench presses do...
It's off topic, really, for this thread, but the difference in angle between incline or decline presses doesn't reverse the involvement of the chest muscles. The chest muscles contract when you bring your arms together
in front of you - even if you alter the angle. To open your arms and pull them apart when they're in front of you, involves muscles to the rear of your shoulders (that contract to pull your arms apart when in that plane). Presses, be they decline or incline involve the chest because either involves bringing your arms together
in front of you against the resistance of the weight (and in fairness, require significant involvement of the triceps too). In general, pressing movements in front of you, work chest (and triceps, possibly the front of your shoulders), rowing movements (PULLING towards your trunk) muscles to the rear of your torso (and biceps) - (conveniently ignoring exercises in the vertical plane, like shoulder presses, and upright rows).
Each to their own, though there are a lot of gym addicts (myself included, once upon a time...) who would be inclined
But as you say...
Thing is, though, there's plenty of "confused" souls in gyms, their agreement or disagreement won't change facts. And the facts are that the chest muscle contract to bring the upper arms together in front of you. Muscles to the rear of your shoulders contract to pull the upper arms back and apart.
Those are facts and not influenced by peoples' opinions or beliefs.
Now true enough, muscles don't solely fire for concentric contractions, but when we're talking about the primary purpose of particular exercises, that tends to be the emphasis. Even exercises that seem to reggae with that (like stiff legged deadlifts) you could easily argue that the concentric aspect of lower back muscles to raise the weight, and the impact of the exercise on working the lower back is kinda primary.
Regardless, though, and angle of attack for bench presses does not change the fact that it's the pushing with the arms, and as a consequence them moving together in front of the body (yes, even if there's some variance in the angle of the bench / torso) that is what is working the chest in terms of concentric contraction.
I should know, because once upon a time I was an "engineer" where the body, exercise, and gyms are concerned.