It’s not entirely wrong. There is absolutely a bias in what gets studied simply because it requires money to be given to study most things. For example, it’s why some more natural remedies like taking fish oil to help lower cholesterol took so long to have actual scientific backing; there’s no money in widely available remedies so finding funding to do the study was difficult.

You can see this really clearly if you look at more politicized areas, like economics. And for what it’s worth, it doesn’t mean that the evidence that’s generated is bad (although the conclusions drawn from it may be), but that it results in a lack of evidence for opposing viewpoints.