It is rare to convince someone of something they don't want to see.
Because there are reasons they don't want to see it. So, don't bother — it may not be worth the effort to convince until those are identified.
I'm not that different. I'm often only convinced when I'm willing to be or when I am open to it. So, what causes this kind of opening? Usually not argument — the pain of argument, maybe. Usually, I become open to something when I need to be; sometimes when I want to be. Then I can be convinced.
...and another feature of being convinced that seems to be a universal — after one feels heard.