Shidduchim were not conducted as they are today, and we had FAR fewer unmarried men and women in those years.
We had far fewer people altogether.
The more important question to ask, though, is whether there are, TODAY (because there are too many variables to fairly compare different eras), a higher percentage of unmarried men and women among the group that uses the shidduch system, or among the group which uses self service.
The answer, oomis, is not in your favor.