Please show me where you explained that Vivaldi’s source code is harder to investigate because “users need to download a 2 GB repo” or a “tarball dump”.
I can see why you think this is not entirely implied. But I also don't think that it's incumbent on them to have laid it out with such specificity. You can read this reference to closed source in the most charitable way as alluding to the whole motley of things that render closed source projects less accessible.
It takes a little squinting, sure, but the internet is a better place when we read things charitably, and I don't think such fine grain differences rise to the level of straight up misinformation.
I mean, there are some real whoppers around here on Lemmy. There's no shortage of crazy people saying crazy things, I just don't think this rises to that level.