Two separate reasons not to, and the second matters more than the first.
Reason one: it is not yours
A manufacturer's photograph is their work. Using it on your listing is using somebody else's property to sell your item, and a brand entitled to object can have the listing taken down.
Metzee can remove a listing — the seller then sees Metzee took this item down, so it can’t go back on sale. Contact Metzee from Help if you think this is a mistake. A brand photograph on a second-hand item is one of the things that gets a listing looked at. My listing was rejected
Reason two: it hides your actual item
This is the one that costs you money.
A studio photograph shows a perfect example of the product. Yours has been worn, stored, handled. The buyer is not buying the catalogue image; they are buying your copy of the thing, and they cannot see it.
So what you have built is a listing where the item is guaranteed to be worse than the photograph. That is a return waiting to happen — and an item not as described comes back for 7 days whatever your returns policy says. The brand photo did not save you work; it deferred it. How to describe condition honestly
Where it is legitimate
A sealed, unused item, as one of your six. For something still in its packaging, a manufacturer's image showing what is inside the box is genuinely useful — alongside your photographs of the actual sealed box you are holding.
Never as the only image, and never the first one. The thumbnail should be your item.
What to do instead
Photograph the thing you have. Window light, plain background, item filling the frame. It takes ten minutes and it is the whole job. How to photograph an item
If the item is genuinely hard to photograph well — small, shiny, dark — that is a lighting problem with known fixes, not a reason to borrow someone else's picture.
The signal you are sending
Worth naming, because it is the real cost. Experienced buyers here read a stock photograph on a used item as either laziness or concealment, and neither makes them bid. A slightly imperfect photograph of the real thing outsells a perfect photograph of a different thing, consistently.
Showing the actual item with its actual flaws is the single clearest way to look like a seller who can be trusted on everything else. How to find a seller you trust
More: how many photos should a listing have, what you can and cannot sell, how to write a listing title.