If you want to help orgs who have come to the conclusion they need to diversify to EU services, it does not mean you have to have come to the same conclusion! Also, it's not the same kind of dependency if you get or buy something one-off from a website like this, as if you build your org on top of a single platform/jurisdiction.
They didn’t explicitly point to hypocrisy as the thing that makes it “unserious.” Actually I think a lot of serious projects are a little bit hypocritical, a little bit of hypocrisy is often the cost of contact with reality.
In this case it isn’t even clear where the hypocrisy comes from, though. It’s a service for looking up other services. Does it even handle any PII?