Exhibit A: Page 29/30 of the MHS Pistol Evaluations. This is The FBI investigation we are all familiar with.

the Above details that, out of a total of 50 attempts there were a total of 15 instances (or 30% of all attempts) where the striker made contact with the primer. out of those 15 instances, 9 of them fired the primed case.
Below wasn't featured in the video, but I think its important to show. Page 32 of the report:
if you believe these documents, then it is possible to defeat the striker safety on a P320 with forces common to law enforcement, as shown by the tests, and the conclusion reached by the FBI.
Exhibit B: MHS Pistol Failure Modes, Effects, and Criticality Analysis (FMECA)

The above is a heavily redacted document found in the public domain, obtained from, according to the video, "Derek, from practical shooting insights, sourced as evidence in a lawsuit."
The catch here, is that this document is not very well redacted. In fact, it is stupidly easy to un-redact this document using basic PDF editing tools.
I would know, because below is my attempt at unredacting this.

Literally just remove the top layer. its that easy.
Below is an original copy of the document from court listener. try it yourself. you can literally highlight and copy+paste its contents into a separate document.
since the document itself is formatted fairly obtusely, the video provided a more readable version of the relevant information from the document. Again, this is all sourced from a document submitted
by sig sauer for the MHS trials.

I would like to highlight items 1 and 2.
- Pistol accidentally/unintentionally discharges (from impacts to weapon or mechanical failures with the striker)- sig believes that this is improbable to happen due to the addition of the striker saftety.
without the striker safety, this is likely to occur within the life of the item.
So, Sig Believes that, without the introduction of the striker safety, It is likely for the P320 to go off from impacts/vibrations within its lifetime.
According to the FBI report, It is possible to defeat the striker safety with regular forces expected from law enforcement use.
Do you see the problem?