The air is foul, not just from recirculated germs but is full of toxins from the engines:
Awareness 'asbestos of the sky' – the aviation industry’s darkest coverup
Let's not forget the radiation. The higher you are in the sky, the more radiation you are getting (less protective atmosphere).
You fly coast to coast - that's a chest x-ray. Fly over a pole...a LOT more than that.
You fly once a week, coast to coast for 5 years...that's 500 chest x-rays.
It's not horrific...but it ain't good.
There're 52 weeks in a year man. That's 260 x-rays per 5 years.
You're right. We receive some amount of radiation when flying. But is it significant for a human? Considering pilots and flight attendants experiencing this almost on a daily basis, I doubt that.
But at the same time, we are all different. Speaking for myself, I am actually predisposed to cancer. So I prefer not to use planes if there's an option.
So, I agree. Neither horrific nor good.