It’s important to have clinical trials. I agree with Mark and @reshamn on this point.
I also want to point out that before going on clinical trials. The drug and medical devices being tested must have been tested intensively in many different models in vivo, vitro to assure the safeness and efficacy.
I think the point of clinical trials is to bring a better treatment for most people/society for generations to come. In the Belmont Report, it stated 3 principles essential for research with humans which are respect for the persons, beneficence, and justice. The last point justice has two parts:” Fair procedures and outcomes are used to select research participants, and there is a fair distribution of benefits and burdens to populations who participate in research”. So the benefit of a successful clinical trial can benefit a lot of people in the present and future.
Furthermore, many people are suffering from incurable diseases or at the later stages of some deadly diseases. In those cases, sometimes, clinical trial for a new treatment had offered a new hope to them.
With that said, all the steps/tests before going into clinical trial be done thoroughly and correctly to minimize risks and the study design needs to be ethical and maximize benefit…

Reference for Belmont Report: https://phrp.nihtraining.com/index.php