As time goes by and having been round these wonderful things I see people complicating things that don't need it. The cyclekart can be made very simple. There is no need to overthink it.
Some have the attitude that if it breaks, I'll just fix it stronger. Others, if it never breaks it may have been stronger than it ever needed to be. Normally that means either more complicated, or made of heavier material.
Neither stance is wrong, but they do go better lighter. Of course, heavier equals greater loads on every part too, especially the most delicate which may be the wheels.
Don't bog yourself down with "what if".