What's this tangent about? Seriously. If I am wrong, I apologize in advance, but it seems to me that you have posted this trying to pick an argument for the mere purpose to share with the group your expertise and knowledgeable skills in Botany. It just seems that way to me.
Some people plant their seeds after germination with the tap root ALREADY in the direction it is supposed to and will be going anyway. I could understand if someone posted a thread to "plant your tap roots UP" Now that would be wierd and something to thread and question.
All of us on here grow plants. Usually more than just one. Some of us are horticulturists. We just share what works and what makes sense.
good luck,
Elway