Of course they're not going to speak that plainly, you have to use some deductive reasoning. Everything in my answer they said:
1) "The figures are slightly shorter than the original" - they are admitting that the figures are shorter (anyone can see this, but they admitting it)
2) "there is a slight shrinkage in the process","they often break and have to be repaired on site, resulting in the figure shown being not exactly the true proportions." - they are admitting here that the figures being shorter is not intentional, it is either because there was shrinkage, or the resin prototypes were damaged, or both.
3) The factory is in charge of handling the resin prototypes (and if there is damage, compensating for it), and engineering the molds to compensate for plastic shrinkage.
4) They admitted the figures are shorter than intended, but clearly, they didn't catch it when they were doing QC on the test shots, Super 7 is responsible for verifying that the test shots that the factory gives them match the resin prototypes before going into full scale production
In summary, they admitted the figures, they admitted this wasn't on purpose, and they pinned the blame on the factory, and by admitting the figures were supposed to be taller, they admitted that they didn't catch this mistake.
The figures will be this size going forward unless Super 7 corrects their mistake.