Not really. Would you take webdev advice from a company where their own apps are memory hog/leaking garbage (Gmail)? At some point you need to call a square a square.
In fact, it wouldn't be hypocritical even if the authors of web.dev themselves worked on a site that did badly.
It is, after all, a tool. It's not a declaration of superior intellect. It's not an article of condescension. It's a tool.
If there's any other decent page speed assistance I'd love to see it.
Wait, was web.dev built by the Gmail team? I always assumed Google was bigger and more complex than that?