Is it nice up there, OP, on your high horse?
Everything you've said, I could quite easily counter, but your question arises from the fact that YOU specifically are not offended by large breasts in video games. You not understanding doesn't make it wrong to be offended, and your 'arguments' fail to dop anything but emphasise that you cannot even understand WHY it could be construed as offensive, regardless or whether you yourself are offended.
Some women will find it offensive, some men will find it offensive, I'm not saying that they're right or wrong, but the whole premise of your thread basically says, "I am right, you are wrong to be offended." Well, no, because people are entitled to be offended by whatever they please. Writing a thread about it isn't going to change anything.
For the record, I'm a female and vocal feminist, but I don't find the breasts to be offensive. I DO think it objectifies women, but it's not just video games (which need to be marketable to a certain demographic - at least until more areas of the population take up gaming as a hobby), the mainstream media is more of a problem than video games. I think it's bad taste on the designers' and producers' part, but that's not going to change anything. As men will be objectified by having rippling chest muscles, women will be objectified by their breasts. The difference is that it tends to be young, immatrue, horny male gamers the companies are trying to appeal to, as they still seem to be under the impression that there are no female gamers.
Idealised males appeal to other males who would want to be like said characters, women with large breasts appeal on a sexual level. So it's not that men aren't necessarily objectified and women are, it's that one is objectified in a 'I want to be him' way, the other in a 'I want to do her way'.
You see the double standards? That's part of the problem.