The Divine Soul sorcerous origin in Xanathar's Guide to Everything description states:
Sometimes the spark of magic that fuels a sorcerer comes from a divine source that glimmers within the soul. Having such a blessed soul is a sign that your innate magic might come from a distant but powerful familial connection to a divine being. Perhaps your ancestor was an angel, transformed into a mortal and sent to fight in a god’s name. Or your birth might align with an ancient prophecy, marking you as a servant of the gods or a chosen vessel of divine magic.
If this power is innate and stems from the sorcerer's connection to a deity, does that mean that such powers would not necessarily come by the will of that deity?
Would such a deity have the ability to simply remove the sorcerer's powers?
I am a DM, and at my table, a player made a Divine Soul sorcerer with an incompatible alignment with the chosen deity. We are still at the character creation process, so we are revising rules and character backstory. When I learned about how his character shares blood with a deity but is quite the opposite in alignment, I've said, "Be warned, the deity will try to change your ways or threaten you with removing your powers." For which his main argument is "I share blood with such deity. My powers do not come from his will, but by the power in the blood itself."
I would like to know if there is some written evidence about the source of such power to make a fair decision that will impact in the character roleplay.