Why wouldn't Steve want his wife to have lived as long as he did? It wasn't ridiculously old age. I haven't read the House of M Cap tie-ins, but I'm told his life was pretty sad at that point. Surely it would make more sense if his greatest desire was to have not been frozen, and then his life played out?
And Wolverine's desire wasn't for a specific incident to be changed, it was for something about himself to be different.