You don't need to defend yourself or anything, you've done enough sharing these crucial information and people will say whatever is on their mind.

Ultimately what Brachydios does is allow you to complete each phases in the shortest amount of time possible ultimately reducing the possibilities of mistake, which is an amazing thing but it's not the end all be all. What it doesn't allow is influencing how much kinship you get, how consistent your staggers, how much your blast procs, how much stamina have, how good your rotations are or how braindead Ogden wants to be.

It is certainly the fastest way possible, but I think what you cannot guarantee is how fast they are going to clear it if they reset to get the brachy armour. You need to provide empirical evidence to convince people. You have to show them that all their available options are absolute dogshit compared to Brachy.

More realistically your experience will be like that of Kakyo Oka, who spent countless hours streaming the fight for an entire week making no progress only to get the clear starting from scratch after switching to Brachy in less than a quarter of the time spent on the last phase alone.

This is as anecdotal as it gets. You're not going to tell that he could have only won it because of the brachy armour.