Oh wait, no. There is no excuse for over speed in a modern airliner.
Lion Air, I give the pilots some credit as while they failed basic memory item(s), it was at least a novel situation presented to them by a dysfunctional airline failing to fix the issue. Ethiopia has no excuse. MCAS has nothing to do with that one, as it never should have been active. I don't think any aircraft would have made it back with that level of piloting, as most react poorly to pushing past Vmo as far as you physically can.
Here you are wrong. I can easily see Boeing witness on the stand describing exactly how MCAS works and that is it safe, "making already safe plane safer" logic, etc, etc.
Then the plaintiff's attorney asks simple question: "given the exactly same breakdowns (AoA sensor) and exactly the same pilot responses, would this aircraft crash if it had been 737NG?"
Then the witness squirms and sweats, and finally speaks in low voice "No.".
And the attorney again "So there WAS difference in behaviour of NG and MAX variants, a deadly difference, so to say?"
Witness sweats and squirms and in low voice again "I would not say deadly...and training..." Attorney: "Well 350 people were killed, can you please answer". Witness, quietly: Yes".
And then the attorney delivers the final blow "So despite deadly differences between the two, you did everything you could to make aircraft certified WITHOUT any training in differences?!"
Case closed, damages won.