But... But I was told non-mining nodes are essential to Bitcoin security and decentralizationings

And I when I told you that non-mining nodes are irrelevant, because trivially faked, you got upset...
And now
...you're telling me that non-mining nodes are irrelevant, because trivially faked?

Everything is important, albeit without the miners you can't do anything either. The number of nodes was never a good metric as there isn't a good way to count all of them. In addition to this it is easy to set up a lot of fake nodes, ergo inaccurate metric. Keep drinking the kool-aid and trying to troll.