True. And the case of what upscaling does is technically truly interesting and nuanced... but that doesn't mean that people don't have a sense of what zooming in does to an image, CSI "zoom and enhance" be willfully ignored.
Which is why both sides can ask the other side to substantiate their claims or provide expert testimony to justify their claims. If there is no issue, then the other side will be able to relatively easily find someone to testify to that or provide other evidence.
It's how the system is meant to work. If this is being used abusively, the judge will catch on soon enough.