That's old news and it's not already happening, it happened because someone bent it on purpose. I've had the phone for 8 weeks and there's no bending or cracking here.
It's happening "to real people" - I've read about it and if you search you'll find it.
It is the fault of the consumer - they drop it, or maybe had it in a pocket and sat down, or something like that - but, no other flagship phone breaks this easily.
So hold on to your precious Pixel 4XL and don't ever drop it - you'll be OK. Don't put it in your pocket just to be safe. Hang on to it tightly.
I'll be moving on - Got the Oneplus 7Pro for $499! Wow. Much bigger brighter and better screen.
And thank God you can run Android 9 on it until 10 gets less buggy.
And actually use TWRP and make image backups and such.
I have had only Google phones since Nexus One. Then Galaxy Nexus. Nexus 4. Nexus 5. Nexus 6. Loved them all, but I don't want an inferior Apple knock-off, and that seems to be all Google can do.