Yes, it's true that the most distant galaxies we've observed are only around 13 Gly away, but the fact that number is so close to (speed_of_light * age_of_unive

Yes, it's true that the most distant galaxies we've observed are only around 13 Gly away, but the fact that number is so close to (speed_of_light * age_of_universe) is just a coincidence. We could, in principle, see light emitted from points in space that are currently 46.5 Gly away, but all such light was emitted long before any galaxies had formed. The OP wasn't mentioning that we can see to a maximum distance of ~13 Gly as an unrelated fact with its own cause, it was saying it was because the Universe is ~13 Gy old and that's how far light can travel in that time, which isn't true.