mostly just lies from competing industries
My Master's Thesis and PhD Dissertation were focused on fuel cells as an energy storage system of the future - I've got more first hand experience than most with no influence "from competing industries". I want this technology to work - badly.
That said, you're right that fuel cell cars exist today, but so do batteries, and with today's technology any "meaningful comparison" will quickly point out that today's batteries are:
More efficient, cheaper to manufacturer, much cheaper to operate (have you checked the price per kg for (mostly fossil-produced) hydrogen recently? YIKES!), more user friendly for most (not all) drivers, and (a little more subjective) way more fun to drive.
Yes, batteries do have their problems (long haul & heavy duty applications, refueling time, cobalt sourcing, flammability, ...) But so do PEMFCs (fuel cost, platinum sourcing, reliability & safety of ultra high pressure fueling infrastructure, fuel cost, complete lack of availability for green hydrogen, fuel cost, relatively rapid chemical degradation of electolyzers through catalyst poisoning, forever chemicals involved in the production use and disposal of Teflon/Nafion, ...)
Again, I WANT fuel cells to win this contest, but today? They've got a lot of catching up to do before they overtake the leader, and unlike batteries, in their current state I could not in good conscience recommend purchasing an FCEV to anyone I care about.