@sunnirivers ,
Finding the right pulmonologist we trust and comfortable with is very, very crucial for us on this journey. I had seen a different pulmonologist on the same team just to get a second opinion. My pulmonologist is very open minded, he referred me to his colleague because this colleague's specialty is BE. I saw this colleague twice and then I decided to stay with my pulmonologist. If I were you, I would ask my pulmonologist for a referral, if he has problems with that, then you know he might not be open minded, to me, not open minded, not good. It seems your pulmonologist gave you some clear answers, it seems he knows what he is doing, I like doctors who give clear answers even though we don't like it . In any case, a second opinion is always a good approach.
Good luck!
Ling