Here are Strawson's words in context. I must admit, it seems a bit of a departure from what he says both before and after (eg that it all comes down to luck). I wonder what he means by 'weaker' too.
https://books.google.co.uk/books?id...timate” before “moral responsibility.&f=false
That's actually a really nice interview. In context, Strawson seems to be saying that we are emotionally and psychologically invested in talking about moral responsibility even though it has no real basis. He is hedging a little bit, but still maintains that actor-initiated behaviors have no special status compared to incidental causes. If nothing else, I think that should be the key takeaway from his argument, regardless of what anybody's particular notion of responsibility may be: the causes we regard as especially important for assigning moral responsibility (however we may define it) can't be meaningfully separated from the causes we treat as trivial by any non-arbitrary standard or principle. Our go-to intuition when looking at consequentialist forms of praise and punishment is to focus on the actor, and evaluate the degree to which he should be used as an example based on his causal involvement in whatever he did, but that may be an oversimplification in light of Strawson's conclusion. It may be a better use of resources to forego entirely the process of meting out negative (or indeed, positive) repercussions and focus on the deeper causes of human behavior.