The same isn't true for GCP - there they lost some writes to customers persistent disks - but only ~50 megabytes worldwide, which is still rather good when you consider they store millions of terabytes.
It seems that every other day you learn about people being permanently locked out of of their Google account. Every byte of data stored in there is permanently lost to the person losing their account.
"We have always had better storage durability than Europa."
Note, I am not arguing that this is necessarily what happens. The thread full of contrary views on cloud storage just tickled this cynical take loose from wherever it was lodged.
Back in the aughts Google was infamous for disappearing mail, if not entire accounts just disappearing into thin air.
https://techcrunch.com/2006/12/28/gmail-disaster-reports-of-...
https://www.theinternetpatrol.com/has-your-gmail-email-disap...
Years later:
http://www.cnn.com/2011/TECH/web/03/01/gmail.lost.found/inde...
As far as I know, they just haven't admitted to losing consumer data. Until they define that and put even a little bit of effort into checking whether it might hold true, they don't really have anything to be proud of.