It is right that some people say that. Accordingly, a number of cable suppliers sell links to replace the plates.
I'm not aware that it is a universal view, though there is no doubt the excitement about bi-wiring has diminished significantly in the 25 or so years since it became fashionable. I can see that less is sometimes more, and bi-wire cables are often bulkier and more costly. Many higher-end designs now seem to come without the option.
I suspect that if you have had your speakers in their original state for several years, cleaning and refastening the plates would be a worthwhile step, but trying links made with offcuts is worth experiementing with. If you buy pre-made links, make sure you can return them (which the likes of Russ Andrews offer) if you aren't impressed.