Its basic physics that anyone knows., Oda isn't an illiterate. Idea of real life physics still exists on one piece, when you punch somebody still hurts, when you move your legs you walk, gravity exists hence everyone is not flying. This is also basic physics.
If EL Thor was stronger move he'd use that on Wyper not Thunder Beast.
Sanji getting knocked out by an attack that I can survive is absolutely pathetic and yes I am most likely not dying to EL Thor. Statistics would suggesting 1/100th chance I die from EL Thor.
I am not surviving holding a metallic sword and Enel pouring thunder into me much thunder beast.