I probably did listen to an Ariya while in Sri Lanka in 2014 and 2016.
“So, Let’s say the DESANA one is hearing from ariya is not fitting to person’s background, then will they still achieve magga phala?”
– It is hard to say. A Dhamma concept must become clear while listening.
Of course, if one has attained the Sotapanna Anugami stage, one will attain all other seven stages without a doubt within a relatively small number of rebirths.