But remember that they also have a Varga. Your basic Varga is a
serious magical powerhouse, to a level that many universe's greater powers tend to look at and go rather pale, while hoping it gets bored and leaves quickly...
This is not a basic Varga. This is an enhanced, essentially fully unlocked, and upgraded Varga, with Hebert accessory pack.
Gods get worried when this pair turn up, and are very polite. Odin knows what happens if you're not...
Luckily they are generally more likely to troll the fuck out of you, rather than cause real issues, then go away snickering at the expression you got. Unless you're Batman, in which case they may keep turning up because it's just that funny.
But, the point is, if Xander goes home and his local higher powers look at him, they could well see signs of him being of interest to something with a lot of teeth that they really don't want to attract, and as a result mark him down as off limits, just in case...
Essentially his magical issues can also be dealt with if required.