My magic beans have prevented thousands of tiger attacks in top secret underground moon bases, never you mind that there's no way for me to actually prove this.
There's a certain irony in pushing for verifiable builds with completely unverifiable claims.
I've worked at several of the biggest targets for espionage, industrial or otherwise, and to the best of my knowledge, the only thing that's ever been discovered by their reproducible build efforts has been failing hardware on build reproducers