WRONG! ECC has caught what would've been random crashes and data corruption twice on my personal workstation that I noticed (detected and corrected). I've seen

WRONG! ECC has caught what would've been random crashes and data corruption twice on my personal workstation that I noticed (detected and corrected). I've seen 100s or corrected ECC errors over the years on my servers and even few uncorrectable ECC errors caught (in one case caused by a bad DIMM and in an other case caused my not fully locking the clips on both sides of a DIMM). You're missing the need for ECC because you're blind to the memory corruption it would prevent until the corruption manifests in large scale symptoms e.g. corrupted compressed files and random unreproducible crashes.