> a senior member of my team expressed the view that he'd rather someone spend three days researching than ask him a thirty-second question

I have never met a senior that would dare to take such a stance; he may be willing to learn, but we will not both cover his knowledge gap and improve his own cv at the company expense. I have no idea if you are competent or not, but it doesnt really matter if you are the one deciding. Its not a democracy, and sure as hell its not amateur day. He will do as he is told, or he will find a more suitable team elsewhere. Have no tolerance for divas, they bring zero value.