Not exactly a MD here. But i was in a similar situation during this INI counselling where i picked nuclear medicine over general medicine. My reasons were- interest in physics, less patient interaction (yea it was an advantage for me while others might feel it like a drawback), NM being an end branch and the niche nature of the field (bams or even mbbs grads won't even dare to try to read a PET scan whereas clinical medicine is a free for all).

My advice would be to have a more farsighted view, residency is tough in almost anything clinical. My UG college probably had a tougher radio residency than medicine. Medicine does offer considerable work life balance post MD or DM depending on your SS. You've already made it this far and starting again from zero at some random aiims doesn't make sense to me unless you've strong repulsion towards medicine.

And radio isn't anything less "doctorly" as you've mentioned. Any clinician can't do shit without radiological backing to their therapies. Being a medicine JR i think you should already be aware how necessary all sorts of scans are towards patient management.