When particular guns were in short supply because Colt and others were making "Collectibles" at a high markup, it affected us who like to shoot. Not only were prices for collectibles high, but their regular firearms increased in cost because collectible sales made the other products even more scarce and prices rose to ridiculous levels.
Used gun prices are also affected. About 15 years ago, I bought a Winchester 52C target rifle in great shape for $550. Today, the same rifle is often priced around $2,000. About 8 years ago, I bought a used Winchester 69A, in beautiful condition, for $250. Today the same dealer is selling the same model, in not as good shape, for $750. Why? Collectors are snapping them up and paying ridiculous prices, so we can't find one at a decent price.
I could go on, but hopefully, you get the point that collectors are harming the shooting fraternity.