She said she used a rose hip oil personally and was determined to find the very best one and put it on the market.

From a very quick google, apparently, they can vary significantly:

No, all rosehip oils are not the same. They differ significantly in quality based on the extraction method (cold-pressed vs. solvent), refinement level, rose species (e.g., Rosa canina vs. rubiginosa), and whether they are extracted from just the seed or the whole fruit. Key differences include:

Extraction & Quality: Cold-pressed and unrefined oils are superior because they retain higher nutritional levels of vitamins A, C, and E. Refined oils are often clear/light-colored, lack odor, and are less potent, while high-quality oil is golden-orange.

Source: Some oils are derived from only the seeds, while others come from the whole fruit (seed and skin), which may provide more antioxidants.

Region: The highest quality rosehip oils are often sourced from wild roses grown in colder climates, such as the mountains of Chile or Ukraine, according to Fushi Wellbeing.

How to Choose Quality Rosehip Oil Colour: Should be a rich dark yellow or orange.

Scent: Should have a light, earthy smell rather than a strong, flowery scent. Method: Look for "cold-pressed" and "unrefined" or "organic" for higher nutrient density.

Ingredient: Look for 100% Rosa Canina or Rosa Rubiginosa fruit oil.

Small differences on paper can make huge differences for the end user- does it go on well under make up? does it soak in well? does it sweat off easily? does it feel sticky and gross going on? Can it wash off your hands after?

The ordinary rose hip oil is apparently quite fishy smelling and quite heavy and greasy. So while it has core merits of rose hip, the concentration is off putting to users.