My reply to TheAntiChris addresses this distinction. I simply do not agree that anything like a sizable percentage of people believe what you say they do. Everywhere in society, people are lauded or criticized, on a personal level, for their behaviors. Not just in a legal context, where there is some control over the fate of people who are accused of undesirable behaviors, but in everyday life, in the media, in our stories as a culture and in all art everywhere. In politics, in religion. It is accepted without question that people should be judged, if they are to be judged at all, on their actions. Show me even a handful of people who actually believe--as I do, because it is the incontrovertible truth--that Donald Trump is in no way to blame for any of the actions he takes as President, and does not deserve any scorn on a personal level (though the scorn may be useful for creating negative incentives). Can you find even one person with any visibility in society who honestly believes that? Of course you can't, because society doesn't provide a platform for that view, even though it's necessarily true, because almost nobody takes it seriously. The large majority tie a person's inherent value to their behavior in a way that is exactly in line with Strawson's argument, which makes his argument exceedingly relevant.
You're clearly mixing up different levels of behaviour. The reality is that people do responsibility ascription at the same time that they are going to do all sorts of things to take advantage of the situation, not necessarily as compensation for the offense or the damage suffered but often out of sheer greed. Some people will get violent, some will try to steal, some will try to score political or ideological points etc. Doing one thing, possibly many things, won't stop them doing responsibility ascription. I don't think it would be possible to understand human beings and life in society without taking this into account and seeing it as absolutely central to how we relate to each other.
Now, yes, ascribing responsibility comes with blaming and shaming. However, this is to be understood as a consequence of the fact that we live together as a social body. Most people don't bake their bread, somebody else is doing that for them. However, we still have to do something. Here, it is just walking to the baker's to fetch the bread and hand out a few coins. Similarly, in many cases, most people won't exact punishment by themselves. Somebody else will do it for them. And there again, they will still have something to do, namely to provide the necessary evidence and perhaps to express as vocally as possible who they think is the guilty one, and to encourage whoever will be exacting punishment to exact enough of it. And then, of course, you'll have many people who will try to use this opportunity to unload all their life's misery and frustration onto the offender. And, yes, it's done with Trump to some extent, even on this forum.
All this doesn't detract to the fact that responsibility ascription is a universal and independent variable in social and interpersonal relations. It is even more universal than that. In other animal species, immediate retaliation exacted in person is probably the only punishment option available. We humans do responsibility ascription because we're more sophisticated. If we didn't do it, we would have to go back to exacting retaliation by ourselves, and that's already what many people do out of frustration with the system. Not pretty.
As to the personalisation of blame and scorn, this, too, is part and parcel of living in society. We objectify people. We see them as objects with properties, and in this case "agents". But we already do that with objects, so no surprise here. Still, people are ascribed with more properties than mere objects, like possessing "responsibility for their actions". Part of this, maybe, is a vestige of the way ascribing responsibility worked when there were no modern justice system. It was probably all done by pointing vengeful fingers and shouting obscenities. However, responsibility implies the identification of the responsible one, so it is necessary. Blame and scorn only come with the fact that exacting punishment is often done through, or mediated by, the community, or society. The way our justice systems usually work seem like a dream in comparison.
EB