Look at te frame structure of a trailer designed as a gooseneck pull, then look at the frame structure of a 5th wheel trailer. That should answer your question. The further from the frame the pull point is, the stronger the structure must be.
2004 Silverado LB7 D/A CC LB DRW 4x4, Firestone Ride-Rites, Air Lift Compressor, Line-X Bed Liner, Retrax Bed Cover, Backup Cam, Pullrite Super 5th Hitch, Rear View Cam
AstroStart 2205A Remote Start (from Max Power)
2014 Keystone Outback 5th Wheel
Trail-Air Pin Box,