You guessed well, It’s logical to a point
Some brush pens behave better than others, depending on its consistence (pentel brush pen is quite sturdy for instance, artezza is a nightmare to use so), but you may ruin all of them. Brushes are not meant to apply pressure on them…
I tested many, but I don´t intend to use brushes after, unless I need to and asume damage.
Plus you need to test a range of preasures, as they don´t act same way.