Theology majors may represent a greater proportion of believers in pre-marital sexual abstinance than do business majors, therefore weighting the odds in favor of marriage.
Or maybe Theology majors have a higher pregnancy rate and "need" to marry more often. ;)
Any theory is as good as any other without more data or a way to test it.
Or perhaps it's because theology majors drink more coffee.
Theory put forward to prove that clearly not all theories are "as good" even if we don't have more data or ways to test them.
Yes, even things we believe to be true we have to put evidence for on the table in scientific discourse.
Many couples pair up because their goals coincide and they decide to do this together as life long partners.
Or, to put even more simply, the intersection of their shared values is much much higher than business majors.
And since most people religious or not still have urges people that value premarital abstinence will probably get married sooner.
I don't think that was what you wanted to write.