This was literally my husband's objection to getting medicated 😂 It helped his anxiety, then he didn't have the anxiety to get stuff done, so he thought he should just not be medicated cuz he was terrified he wouldn't have the ability anymore without the anxiety.
Lucky for him I went through the same thing with my meds, but my answer was, "Use the medication to build good habits." Which is the great wisdom I passed on to him (which I probably picked up from lurking ADHD spaces before my (and his) diagnosis).