If you have the resources to do this then please do, and collect the data and write it up. I'll just note that you wouldn't be replicating this study, which was

If you have the resources to do this then please do, and collect the data and write it up. I'll just note that you wouldn't be replicating this study, which was not randomised (they picked 13 people that the charity was already engaged with). This kind of larger scale randomised experiment is exactly what we need to prove the hypothesis.