I have not benched for 6 weeks, I only weighted dipped + pec deck or something like that for 6 weeks for chest.
Before this period I could bench 110 kg x 5 reps x 3 sets.
After this period (yesterday) I benched 110 kg x 7 reps x 3 sets.
Not a huge improvement, but still improvement (with no benching at all for 6 weeks).
Also, my shoulders and my elbows are perfect, no pain at all.
So, in my case, yes, weighted dips helped improve the benching performance (or at least did not make it worse).