I am not an astrophysicist, but I don't see any reason to doubt the study's conclusions. But isn't the more pressing question the probability of such a CME hitting the Earth? The sun is not small, and CMEs could be ejected away from it in any direction, I would think relatively few of them hit any of the planets?
Kurzgesagt has a nice and objective summary on the topic. If I remember correctly, 50% chance of a big one hitting us over the next 50 years (or by 2050, can't remember exactly):
https://youtu.be/oHHSSJDJ4oo
>Auroras were seen around the world, those in the northern hemisphere as far south as the Caribbean; those over the Rocky Mountains in the U.S. were so bright that the glow woke gold miners, who began preparing breakfast because they thought it was morning.[8] People in the northeastern United States could read a newspaper by the aurora's light.[15] The aurora was visible from the poles to low latitude areas such as south-central Mexico,[16][17] Queensland, Cuba, Hawaii,[18] southern Japan and China,[19] and even at lower latitudes very close to the equator, such as in Colombia.
I believe it is the fact that the solar system was once a spinning ball of gas and dust, and the spinning motion caused the cloud to flatten out into the protoplanetary disk. Like flattening a ball of pizza dough by spinning it in the air.
When the solar system formed, the gas cloud collapsed along the shortest axis first into a spinning disc and then formed the planets and sun. This naturally aligns the largest bodies in most systems along the astral axis.
