Idk exactly how much stress these can take before they break, but you can probably assume whatever 'wear and tear' they do sustain from ordinary usage, won't heal remotely as evenly or without complications as a natural, whole penis, which have also specially evolved features to mitigate damage.

The separate parts cobbled together for phallo probably don't work or heal together well at all, would need regular skilled medical maintainence on a good month, and most likely comes with a detailed Owner's Care manual with exacting instructions.

Not exactly the kind of tool one can just let loose on a bunch of guys(assuming they're thirsty enough to want a strange limp dick). Yeah, I have many reasons to doubt the veracity of this transman's account.