no .. you need 'proper' drop down supports ... no supports, as you rightly say is only going to result in the scenario you describe ....
and over stressing the trailer's integrity ..
I can well see why the integral leg idea is used, as the manufacturers can not control loading/unloading, once the trailer is in use and being loaded beyond design capabilities, without suitable propping....
you put a 'stick' over your knee to snap it ...
's what's happening to the trailer without adequate supports.
I know in an ideal world drop downs/adjustables are the solution, but sadly they rarely get used and the integral props are a poor compromise