I can say that your question of:

“does the time span mentioned in your post allow for any real statistical validity?”

Is a valid one, but I was thinking of the present time period.
Right now there seems to be an upward trend in the magnitude and frequency of some earthquakes, the magnitude 1 to 2 range seem to be more common in the US, but the large magnitude 8 to 9 seem to be increasing worldwide.

I like to speculate on the cause of such increases.
As you said, the Earth has been rumbling for billions of years, but I believe that such happenings should not stop us from speculating as to the causes of such rumblings.

Do you have a clear understanding of all the forces that affect the Earth’s crust?

Certainly the tectonic plate movement is a major contributor to such effects, but can you show definitively that there can be no other contributor to such effects?
Has anyone figured out WHY the tectonic plates move the way they do?

Why not simply consider this as a brainstorming session where ALL possible effects, no matter how ridiculous they seem, can be expressed and considered as valid assumptions until proven to be invalid through the comparison of force magnitudes and their possible effects.

For instance Lindy’s suspicion of Tesla technology being used; do we really know what magnitude of vibration forces can be developed with the proper equipment?

And my speculation of atmospheric weight affecting the movement of tectonic plates, we do know how much the Earth’s atmosphere weighs, but has anyone calculated how much more the Earth’s atmosphere would weigh if it was replaced by carbon dioxide or monoxide, and how such difference in weight would affect the pressure balance between the inner and outer areas of the Earth’s crust.

Has anyone calculated how much the Earth’s total atmosphere would weigh if the atmospheric pressure would decrease by 4 pounds per square inch at sea level, and then figured out what such a pressure decrease would do to the global climate?

Even if these speculations turn out to be in areas of insignificant consequences, when they are studied and explained, then the information would be available for anyone that is interested in such matters.

One thing is certain, calling each other names will not increase our knowledge of the universe.