According to that article, basically anything valuable and worthy of putting in a safe deposit box, shouldn't be put in one.
Ridiculous.
But no, I wouldn't store any of my valuable firearms, especially NFA ones, in a safe deposit box.
If I needed safe storage of my firearms while I was away from them for an extended period of time, I'd arrange to store them with family. In a safe that I bought and relocated to their home for just that purpose. A very good quality one and one that my family wouldn't have the combination to open.
But only to family I trust who live in a owned home, no apartments, no rebelious teens, no ex-felons etc.. And I'd put a lot of weight in the bottom of the safe, to deter it from being moved.
If I didn't have family I trusted, I'd rent a car sized storage locker, buy a old van of some kind, put the safe in the back and cover it with useless looking junk and worthless furniture, then drive the van into the unit and disable it by removing the distributor or some other method and remove the wheels and leave it on cinder blocks so it couldn't be easily hot-wired and driven.
All of this assuming I didn't have my own home, of course.
Otherwise I'd just tear up a section of my garage or basement concrete and bury a safe there and poor fresh concrete over it, like John Wick did in the first film.