In my experience, teachers from two different traditions (Vajrayana and Theravada) have said offline that its not necessary to believe in rebirth and literal 'other realms' in order to progress with one's practice of the Dhamma.
I'm not sure what any of this intense debating to and fro and speculation about other lives actually achieves in terms of the present life and practice in the here and now.
The Buddha said "The Dhamma is visible here and now" (AN 6.47)
My own position remains neutral - and my practice has been going just fine, whatever the opinions of others on the internet might be one way or the other.
with metta ,