I understand your sentiment, however, the problem is when we think in custodial terms as the best solution for everything.

You have less than a penny on SN (I'd assume) and that makes the most sense for any person using this website, but if any perception were to be had that paying out of your SN wallet was more coinvent than Alby, and integrates everywhere, we would have completely lost the plot. This would encourage large amounts of Bitcoin being stored on SN for website payments completely unrelated to SN and that was the nature of OPs question.

If we ever get to that point, I would in fact dare to ask what the hell the point of Bitcoin is when custodial solutions for gold exist just as well.