Vision guy evolved a secondary powerset, apparently his visions NEED to be told to others. So when Tony imprisoned him and made it impossible for Ulysses to tell others what he saw, he somehow spontaneously evolved the ability to project his visions to other people. He only seems to do this at the worst possible moments when people are fighting each other over him and things are going serious.
Which brings up a whole lot of other questions because I thought Inhumans didn't evolve like mutants do, and that once an Inhuman had their abilities they were set in stone. Also, again the fact this all centers around an Inhuman that has perfect protection from telepathy, can somehow force his visions onto other people, and seems to be slowly picking off some of the strongest heroes is all going under the radar because fighting about 'profiling' is more interesting.
Keep in mind that the explanation for Ulysses' abilities doesn't even work unless Thanos has an earth cell phone and tweeted about his impending arrival on earth.