As it has been more or less said, everyone already have their home-point at Jeuno... If it was easier to get to, it would be different.

I always hang around in Bastok myself, but I still keep Jeuno as the home-point due to it being kind of far from the Outposts. I teleport to a crag to use the Field Manual to get home, so a scroll for this would really change nothing for me, but it would certainly be convenient, and very much appreciated.

I definitely can not see it making Jeuno more congested as a honest and serious reasoning against it. With all due respect, that seems more like a joke that makes no sense than anything else...