Nah, I don't agree there =)
I got an override to take them both together in the Fall and I did very well overall. I got an A in gen chem and a B+ in orgo... and there was very little overlap between the two subjects in my opinion.
I did really well in gen chem 1 -- so my teacher let me have an override which they only do for students that do really well at my school-- to have them both at the same time.
I didn't think it was too bad at all.. and definitely not foolish- as it helped me to get done a lot quicker
BUT- it depends on you and how well you can do w/ such strongly science intensive semesters. It's not going to be easy by any means- but it is DEF doable!
Good luck!