Ironically, the Baha'is have a thing about science and religion should agree... and actually lean toward science, man's observations, over religion, supposedly something brought to us from God, because man messes up religion and turns it into superstitious beliefs. But how unbiased are men of science? But, anyway, that is the Baha'i provision to attempt to eradicate fairy tales.
The realms and planets exist , the reason why they do not wish to merge is in Adveta (non duality)you lose your identity which is positive for those who want it ,
however the creation has a reason and its a cyclic factory to churn the ocean of self knowledge , which evolves the par Brahma as a being and all the interconnected realms which also continue to evolve at higher stages . the interaction between manifest- un manifest is another process in itself.
in bhagwat gita - the ways and reasoning is in detail...for 1- to go to loka's or to go out to un-manifest
in guru granth sahib - way to un manifest is given.
if you come back to manifest - there are two forces - both claim to be good. but both have different reasons to exist. beyond this i will let you be the judge to sense which element attracts you and which do you see as a deception.
on a simpler note ..all ways are given in hindu /sikh scripts.
and many times we have been invaded and manipulated , people till date steal stuff and copy write to market for $..
dharmic religions never profess for conversions , they let things evolve naturally. however the attacks are getting severe towards us , so its time to stand up and defend with awareness or get ready for kal -yug ( when darkness rules in guise of good)
Otherwise the tools to escape will be wiped off for future generations and be replaced by an aggressive force in guise of peace.
if i die today and reborn coz of failed moksha and my personal choice of duality and i come back to this realm and see deceptive god rules..all the scripts will be wiped out..only one script to serve deceptive god will rule.. people with some awakening will be working in underground ..if they re found they will be killed and scripts wiped...and this will go on for many many life times.. no one will escape and all will serve the deceptive god's new scripture.women will be treated like dirt . animals will be farmed . it will worsen deeper and further..(even if this happens for those born will never know spirituality so life would mean world today- spirituality, which isn't that bad but it keeps degenerating to almost no reason to procreate and a
MEANINGLESS reason for the un-manifested to create only to demand worship and no evolution beside that new one scripture's demands)
if the other element wins..then everyone will be allowed to progress at their own pace and way some go to loka some moksha. and since god=timeless there is no rush no need to convert or infuse guilt of hell.