Since Kuntī got a boon from the legendary, Ṛṣi Durvāsa himself, I guess, noone would disrespect his boon thus would have descended down to beget Kuntī a son, as per her choice.
So, why did Panḍu and Kuntī limit themselves with the elemental or solar or netherworld deities only (i.e., Sūryadeva, Dharmarāj, Vāyudeva, Indradeva, & the Aśvinī Kumāras)? Why not invite the 'higher' primordial Gods who are definitely 'more powerful' and thus more 'eligible'? Why not call the Trimurtis (Brahmā, Viṣṇu, Śiva) or Gaṇeśa, Kārtikeya, etc.?
Does any scriptures or any eminent acharyas or hindu personalities or saints, specify or discuss any such reasons for this presumably "hypothetical - situation"?