I had written up a rather epic history of an alternate interpretation of events, but I can't find a good way to end it without giving too much stuff away (not just dev stuff*, but more personal storyline things). So I leave you with this:
Suppose that humanity's arrival in Sirius was planned by the Daam-K'Vosh. Obliterating Sol might be a way of tying up loose ends, don't you think?
*Do NOT take this to mean that the food for thought I presented there should be taken as canon, or that crazy Daam-K'Vosh hijinks are going to happen in 4.86. My timeline blurs into future events, and I couldn't find a good cutoff for it; nothing more.