This article posits that even close cutting electric shavers
The article says no such thing. It goes into depth about different types of electric shavers and what the potential issues are. It very clearly states that there is a problem with most shavers, since they are sharp enough to cut the hair to a point where it drops below the skin.
Honestly, on issues of technology there are some Rabbonim I will trust over even gedolei hador. Rav Heineman is one such rav. He does not paskin unless he delves into the technology himself, experiments with it, and speaks with experts in the field. With all do respect to Rav Chaim Kanievsky SHLITA, I simply cannot fathom that he personally built a rig to see if a lift-and-cut shaver actually does what it says it does.
As for electric shavers in general, it’s a machlokes. But the majority of non-Chassidish American Rabbonim (and a significant percentage of Israeli rabbonim) hold that it’s fine and no different than scissors.