It's true. That box has the utility of the highest utility cable in it. Which means it's a lot. Worth taking up space under a bed you aren't using. Anti-horder culture goes too far. It's more complicated than dogmatically throwing away everything or keeping everything. Don't throw away things with real utility. Civilization is built on accumulated utility in durable goods.
Also, if you tell yourself "I'll just buy a new one if it breaks", take note that the quality of whatever new thing you buy will be worse than the current one you have due to decades of companies skimping on quality to remain profitable.
Also, though it might not happen today, apocalypse things could happen to Amazon or delivery services...better to have things on hand than have to buy them again.