That's a lot of words to say "people are free to steer clear of people they don't like and always have been". And not much of thought into "what changed that now it is a problem perceived by some?"

There has been a fundamental change to our reality over the past couple decades: things you say and do are now by default in public and permanent record. If your not-too-famous grandpa said something outrageous, he ruined the relationship with the people that heard it and the people they talked to. In the worst case it went into a filler column of the local newspaper. He had a limited number of people to apologise to. And in the worst case could move to another town and start fresh.

If you write an outrageous blog post today, you're hosed. Even if you're not famous, or in any other way a "public figure". But just because your outrageous writing (or second-hand - someone else writing about a thing you said) is in public record today, you will find that some people in the far future will get offended by it. You get hired in 20 years as a VP of a large company in another country? Well, someone will dig up that post and before you know it you're out of a job. Saying sorry and that you're wiser now, than when you were a teenager, is likely not going to help. Bonus points if what you wrote is within the mainstream today, but the cultural norms move in the following decades.

I think that's a problem. But it cannot be solved by laws. Right to be forgotten won't work well enough (just a hunch, but international enforcement of soft issues like this doesn't have a reassuring track record). Nor by telling people they have to listen to jerks. That's what the OP deconstructs as obviously absurd. What we need is to build into our culture and understanding that people do change and can reach redemption.