Because it was totally non-sequitur. Anthony Faucci(sp) had just announced that there might be a therapy(Remdesivir) and was discussing vaccine time lines, etc. Then Indian guy asks a fluff question about Trump's visit. We expect it with hostile questions from douchebags like Acosta, but the first question out of the gate and it's a non-topical? It was really an inappropriate question at that time.
The Indian reporter, Raghubir Goyal, is a fixture in the White House press room and a known quantity. President Trump called on Goyal because he wanted to be able to say something about the India state visit without deflecting too much attention from the purpose of the briefing.