Good points!

1) This is indeed an important consideration, although I think for most people the inconveniences would only present themselves during the transition phase. Once you get used to it sufficiently and if you live somewhere with lots of tasty veg*an food options, it might not be a problem anymore. Also, in the social context, being a vegetarian can be a good conversation starter which one can use to steer the conversation towards whatever ethical issues one considers most important. ("I'm not just concerned about personal purity, I also want to actively prevent suffering. For instance...")

I suspect paying others to go veg*an for you might indeed be more effective, but especially for people who serve as social role models, personal choices may be very important as well, up to the point of being dominant.

2) Yeah but how is the AI going to care about non-human suffering if few humans (and, it seems to me, few people working on fAI) take it seriously?

3)-5) These are reasons for some probabilistic discounting, and then the question becomes whether it's significant enough. They don't strike me as too strong but this is worthy of discussion. Personally I never found 4. convincing at all but I'm curious as to whether people have arguments for this type of position that I'm not yet aware of.