That's a good rundown of it. Also, as a question of my own, are snakes capable of feeling any sort of companionship?
They don't have the same neurochemicals than mammals do, so they don't feel "love", but they certainly can become accostumed and even eager to the presence of a friendly... entity, let's say. Not the same as a dog or a cat, but then again, all animals are unique. They are not 'domesticable' per say, but you can take care of them and they'll be... mostly neutral.
Some pythons (very passive) and smaller non-venemous snakes (more active, but harmless) have achieved popularity as pets in recent years. And I can see rich rulers having them as symbol status. However, to properly take care of them, you need a more modern understanding of their behavior and care (most snakes in cold climates need heating and UV lamps), since they're somewhat delicate.
Also, yeah, snakes are literally Satan in the Bible, and most cultures don't hold a very high opinion of them, since some (not all) are venemous and not very charismatic.
Then again, some cultures did respect and even worship them. Maybe they could be interested enough to domesticate a few.
Not very likely, but it could happen.