It sounds like the article is an update to the age old performance issue discussions between hardware and software RAID solutions.
If you use a software solution for anything where there's a dedicated hardware solution, the software solution is always slower due to CPU overhead.
Article recommendation boils down to: If you're going to use encryption, and you want your full disk speed, use a hardware encryption solution. In their test their hardware supported OPAL.
I know Margie is as dumb as the day is long, but did she really forget what leading an insurrection actually looks like already?