I don't claim to know IBM's motivations for why they didn't join LO right from the beginning. However, when Rob uses the phrase above "absurd" when talking about working together in other situations, it suggests that he at least sort of thinks that joining LibreOffice was instinctively a bad idea. Some good ideas sound absurd until they are thought through more. His choice of words and analogies suggests motivations and that things weren't thought through.
There is evidence that the OO fork is hurting LibreOffice. Not many people talk about it or think about it, but it is there. At the very least, I can say that this AOO project causes stress for the LO team. Does stress not hurt?
I agree we should be working together. However, forks and social engineering can prevent that from happening. Being nice is helpful, but creating situations that allow people to work together is also very important. This discussion is about the latter. The pleasantries were first exchanged many months ago.
I didn't suggest that AOO needs to work "for" LO. I want them to work "with" not "for". Having worked in Microsoft Office, and spent a lot of time in OO/LO I can say it will take a lot of you. Firefox and the Linux kernel are good enough for basically everyone. LO / OO are not yet, and it needs a lot of help, and to work effectively and efficiently.