“you should prioritize having an opportunity to say BARCHU ES HASHEM LEOLAM VAED and AMEN YEHEI SHMEI RABBAH MEVORACH LEOLAM LEULMEI ULMAYUH'”
Again and again: The question was if it was “Muttar” i.e. “Halacha”.
The answer is Yes.
“Prioritizing” is something each individual has to do, like everything else in life – e.g. will I waste my time in the CR here (this thread is about learning though:) or learn another mishnah, daf, posuk, the time I spend on X Y Z.
And yes, not everything that is “mauttar” or not “assur” means you should indeed go ahead and do it.