I’ll save you the click as someone with many medical issues myself. The answer requires only surface level thinking: if I’m too depressed, sick, or otherwise impaired, I will have less energy to take care of myself. Pretty easy to conclude that. You know where that money could be better spent? Helping solve the problems causing the issue. The reason these studies exist is to justify ableism. The people conducting and funding this research want an excuse to validate their belief that people with disabilities are unattractive. The real-world value of this research doesn’t extend beyond that ableist justification.