There are professing Christians whose interest centers on historical theology or philosophical theology. A danger with that is that if that's your frame of reference, you can lose your faith overnight.
Christianity is centered on events. God's action in history. That gives faith a tangible foundation.
But in the case of historical or philosophical theology, it's easy for that to become a play of ideas. Free-floating ideas. An extension of an extension of an extension. A person can get so far out that they forget how they got there. How, if at all, does it have any appreciable basis reality rather than imagination?
They can maintain that mindset so long as they remain inside the paradigm–like a video game. And it's easier to maintain on social media, where they have mutual reinforcement from like-minded participants.
But if the bottom falls out of your life, you may suddenly ask yourself, why do I believe this? Do I believe this? Or is it just a head-trip? They were caught up in the momentum of the debate, but if your life collapses, and you suddenly feel cut off; if you're abruptly ejected from the mental video arcade, you ask yourself, how could I believe that? There's nothing to fall back on, because it's just ideas stacked on top of ideas. A skyscraper of storied ideas. Nothing to distinguish it from a riot of imagination.
If, on the other hand, you maintain your moorings in Bible history, you have a reality check. Firm ground under your feet.
To be sure, some people lose their faith in Scripture. Ironically, that's often due to their philosophical naivete. I'm not suggesting that philosophy is useless by any means.
But faith in historical or philosophical theology only works so long as you're in the mood to grant the premise or the paradigm. Without something in space and time to ground it, to point to, without that objective reminder, the requisite credulity can evaporate like the willing suspension of disbelief.