The Wikipedia editor was a bit naive to think such a basic study could invalidate that whole claim. They measured the correlation between the list price, adjusted for use amount, and development cost. As far as I can tell they didn't take into account number of customers each drug would have, how long the drug would stay on the market before profits are cannibalized by competitors (see e.g. Wegovy), and definitely not the cost of failed drug development.
> A 2022 study invalidated the common argument as is for high medication costs that research and development investments are reflected in and necessitate the treatment costs, finding no correlation for investments in drugs (for cases where transparency was sufficient) and their costs.[20][21]