Yes, you do. There are enough challenges that science brings to theology that we do not need to force them where they do not exist. Certainly some Christians see need for Adam. Many do. Let’s just be honest about the science with them and see how it shakes out from there. Perhaps the will end up just a different type of Christian than us in the end. That is okay, as long as they are in Christ.
I think mediator is a better term than missionary. But I am aiming to change their views so that we all might adopt a more Christ centered faith. With Jesus as the foundation, we adopt a more orthodox faith and these questions are not so concerning.
My biggest problem with scientific YEC creationism is not its scientific problems but its theological emphases. Our faith is not grounded in a specific understanding of creation and the human effort to study nature (creation science or evolutionary science). Rather, our faith is grounded in Jesus, the one who rose from the dead. By Him, we can find a confident faith, unthreatened by evolution.
As for Adam? There are reasons why the common solutions offered by TE / EC Christians are unsatisfying to many Christians. My point is just that we should be empathetic to the questions of the Church, and not force conflict where it need not be. Instead, lets be honest about how the theological values we bring to the table could work in light of mainstream science.
Regarding Adam and Eve as homologous clones.
Yes of course some people thing that. However. that is not what @agauger and @RichardBuggs has argued, nor is it what John Sanford or most knowledgeable YECs I know have argued. If one model of Adam is falsified by the data, does not mean the other is falsified too. If we are going to make strong claims about what the evidence rules out, it behooves us to take seriously the all the alternate hypotheses we can. To the point, for at least 5 years now, most YECs in this area have been trying to work out a model of created diversity. We cannot claim to rule this model out, unless we actually examine it in light of the evidence.
Of course, as should be clear from my prior posts, baring miracles this seems to be ruled out in the recent past. However, in the more distant past, maybe not. It seem false to say we have certainty there was no single couple bottleneck over the last several million years (as has been put forward). The evidence does not seem substantiate that claim. except perhaps in trans-species variation (but we haven’t even discussed that yet).