In this specific instance it comes down to one thing. Do you think Bentancur is a racist? If so, then your viewpoint holds.
I don't.
I think he made a stupid mistake and regrets it. I think a deep and public exploration, via a converation about the incident with Kick It Out for example, would do so much to educate people who might have done the same. I believe there is a difference between being a racist and being stupid (albeit being a racist IS stupid). I believe you can be stupid without being a racist. And what we're seeing now is that when stupid people/actions are punished with a sense of disproportion and no explanation, those people get forced into corners.
I want them to learn and genuinely understand why a 'casual stupid comment' like Bentancur's can be so offensive to people.
As for whether it's football's job, it certainly isn't their job to try and look like they're 'optically challenging racism'. They'd do better to expand their committment to that IMO.
Genuinely not sure where the fine money goes either, would love to learn.