If you're saying after the 2nd fight he could be out for more than 3 to 6 months then wouldn't that be because of injuries?! Because if not, he won't be out 3-6 months or more but fight withing 3 months which would be less than a year sincee his title win.
Let us put this way, if Aldo had negated Conor his fight for the belt because he wanted to fight in LW (the first one, that he pulled out), you might say OK, the guy has been the champ for years and wanna test himself on another division.
Now, Aldo goes up and loses, not to the Champion of LW but to a top 5, you might think it's time for Aldo to return to his division, where he is the champion and defend his belt, but no, Aldo is gonna go up again, putting Conor and others fighters on hold, so he can get a rematch in LW.
If Aldo loses again, and now by KO, being barred from fighting (or even training) for another, let's say, 4 months, adding that to the time he last fought in FW till the fight, plus the 3 months of his camp, he might add more than one year before defending again.
Would you believe Aldo should not be able to get his rematch at LW, at least not until he defends his FW title again? or it's all cool?
Now see on Conor's case, it's actually his 1st defense of the title, he has not cleaned his division, he might (will) take longer than the last Champion to his 1st defense (the one he complained about not defending often) and here you are, saying there's no case to ask for him being stripped.