I'm not sure what you mean- taking drugs for the sake of it? I don't think I know anyone who does that?? In US, unless you have incredible heath insurance and don't pay anything, medication can be very, very expensive- and co-pays on insurance can add up to lots and lots and why would you do that if you didn't need the meds? And side effects! Why would you put up with that?
I know lots of people on regular medication, including myself. I have an autoimmune connective tissue disorder and my regular meds are a godsend. I was in misery and I feel like a new person now and I can get outta bed in the morning and face the day. So yeap, I rattle! Likewise, I have taken anti-depressants which helped a ton and I would again should I need that help. Depression is a disease and feeling better is all that matters to me.
My sister with RA is grateful for regular meds for getting her out of bed every morning. Likewise I volunteer with a few different Diabetes organisations and believe me, regular medication is definitely needed, and insulin is needed to live for someone with Type 1. Or if you have hypothyroid you need thyroid replacement drugs to live. I could go on forever -people with MS, heart conditions, my friend with a kidney transplant is grateful for her donated kidney keeping her of dialysis but needs to take anti-rejection drugs, epilepsy, mental health conditions, etc, etc etc (more than) appreciate their regular medications!!!!