Wait, what? How the hell was that incorrect? Emma was felled in the first wave of the Sentinel attack, and yes, comatose
Jean's situation was literally life or death...urgency, desperate times/desperate measures, mother lifting a car to save a baby, etc. Plus her mind was in her own body to do the initial transfer....to go back, the circumstances are not the same...Jean's psyche is not in her own body, she's not under attack, and while the body she occupies is telepathic, Emma's mind is completely shut down, and (because this makes the most sense to me), Jean's own telepathy was temporarily expended after such a feat as whole consciousness transfer in mere seconds. Thus, Xavier needed to help bring Jean back
Furthermore, Storm wonders if such a thing could be a reflex for powerful telepaths like Jean and Emma....but at least in Jean's case,we know both from the actual moment, and Jean's retelling of it, that she made a deliberate decision and effort to do it
Despite their worries, we know that Emma did not transfer her consciousness to anyone else, reflexively or otherwise...it remained dormant in her own body, until the power surge
If you want to equate Jean's purposeful action
to that of a freak accident involving an exotic alien energy power surge while she was still in a coma...
be my guest...for me, it's not