Hmmm...
OK brother, I gotta be honest. You SAY it's all straight, true, and tight, but if that were true, you would not be throwing chains.
1. Tight. Really? REALLY? Is it tight in one part of the revolution then loose in another? If so, you have a gear that is either out of round or not mounted concentrically.
2. Alignment. Looking at the chain from the rear, is it really in a PERFECT line? Not even a little itsy bitsy offset?
3. Wobble. No wobbles in the rear gear? Try spinning it with a marker held next to the gear. Does it "kiss" one section and then have a tiny gap?
4. Concentricity. Is it really, REALLY concentric. I suspected this earlier, but here it is again. "Out of round" makes the chain loose, tight, loose, tight. That, combined with a worn chain could cause your trouble.
Bottom line, tight and "true" = no chain throwing. Period.
If all of the above are cool, you have a chain (or gear teeth) that is/are so worn you need to replace one or the other. Looking very, very, VERY closely at the drive gear and the rear gear, do you see any teeth that look chewed up? Bent? That would do it.
BTW, the stock chains on the the newer builds are all 415s. 410s are a touch narrower. I doubt that's your problem. But a really worn chain is just so sloppy it can flop around from side to side even if everything else is OK. That WOULD do it, but even then, only if it were not tight. (And I mean TIGHT.)
Just my 2 cents and what I'd look for if I had your bike to examine. To repeat, "trueness" means three axis: alignment, wobble, and centricity.
Cheers,
Rick