They go out of their way to say jump points are "Natural" but then explain you need a Quantum Drive to open it. So they are not opened naturally. We could still have the sweet ass looking rings around the permanent gates because they are so large and high traffic they "help keep them open" like a permanent "leaky QD" would and it would help digest the ATC, party size, and queuing technical limitations in lore. They could be closed temporarily from any number of in-game lore reasons; creating gameplay. The smaller transient gates could still be all "Natural" and without rings; still needing Quantum Drive to shoot the little Quantum spitball and I assume these will not have ATC. (Would be weird if they did have ATC) We could have our cake and eat it too with both types pretty easily. EDIT: art station for SC jump gate concept art: https://www.artstation.com/artwork/dONeW3