The theory sounds plausible until you look at it for longer than about five seconds. It then falls apart because:
1. Women have been clamouring for dangerous positions like fire-fighting and soldiering for ages now and it is *men* who have been opposing this on a variety of ridiculous grounds.
2. The "glass cellar" only holds true if you selectively ignore traditionally-female occupations such as prostitution which are easily as destructive and dangerous to the practitioner as are traditionally-male occupations like mining and construction.
The "glass cellar" is, in short, a ridiculous piece of whining by a bunch of insecure man-children.