Yeah, I would say that "we built the boat" is simply a lie given none of the eight authors of the paper still work at Google.
“X Built a boat == the builders remain at X until they die” Is a strange definition of building something imo.
When a company provides an R&D lab, we still attribute the results of that research to the company as well as to the researchers.
After all, if those individuals were not hired that position would still be filled with someone similar, but it's hard to argue that if the lab didn't bring those researchers together, they may have individually gotten the same result.
Honestly, it's not as easy as one may think to build a research lab.