I believe that "what if" concerning historical happenings cannot ever be adequately addressed. God is not unaware of anything that is happening, and absolutely nothing can happen that he does not, at least, permit, or allow to happen. The Bible Students' movement was becoming, even before Russell died, a sectarian movement. Divisions and secta have always exsited in the Christian congregation. The apostle Paul wrote of such exsiting in the first century. Although he stated that this should not be, he stated: " there must be also factions among you, that those who are approved may be revealed among you." (1 Corinthians 11:19) Thus, God allows divisions and sects so that those whom he approves may be revealed. Not that they are made known publicly and by carnal recognition. But they reveal themselves to God so as to be approved by God. Man, however, even most of those who belong to Christ, continue in the mode of carnal thinking, and remain as babes in Christ. (1 Corinthians 3:1) It would appear from the carnal standpoint that we should seek to establish the church with some human authority to control it, so that there may be a united front. It was this kind of thinking that Russell often preached against, although I must admit, at the same time he seemed to not recognize that such an attitude was developing within the Bible Students' movement itself. Perhaps he believed that, since the church would soon no longer be in the flesh, that it was not important to speak out against such, although he did more or less quietly speak out against it, as in a meeting of the Pilgrims, Elders, and Deacons during a convention in 1910.
He published his sermon on " The Catholic Church -- St. Peter's Kingdom Keys" in 1915 in the Bible Students Monthly, which shows that he still did not condone sectarianism.
Nevertheless, God is proving his people, not by what "group", or "sect", or "denomnation", or "movement", that they associate with, but by their association with, and obedience to, the one whom He sent to die for us. Indeed, sectarianism, despite how much other considered "truth" is otherwise being upheld by any group, often leads one to fail in obedience to Jesus in loving one another, since the sectarian attitude often would restrict that commandment to their own particular group,