The core of this argument is the design of the parts.
If the pics are from a waydoo battery (which i believe they are) then the design is at the same or lower level than most builds here. It would be good enough when you only put yourself at risk in a diy build but not OK to sell to the public.
It’s as simple as that for most of us, we wouldn’t be able to take responsibility for a battery like the pictured one.