A recent post about account deletion of an Ingress account resetting all Wayfarer data brought up these messages about that happening.
The current wording at I want to Delete my Account — Ingress Help Center is
Note: If you request the deletion for your game account linked to Niantic Wayfarer, your deletion request will include data submitted to the Wayfarer program via this game account. If you contribute to Wayfarer via another Niantic game, these contributions will be unaffected and you will continue to be able to access the Wayfarer portal via the eligible account associated with this game.
But that reads like as long as you didn’t submit from your Ingress account, you won’t lose your Wayfarer data. In fact, it seems to reinforce that you won’t lose the Wayfarer data if you submitted from Pokemon Go instead. But the poster here did lose all that data: Profile statistics reset, past wayfarer agreements set to 0
IMO, “game account” should be changed to “Niantic ID” to be clearer that it is everything associated with that email address. At the very least, the assurance that other contributions will be unaffected should be removed.
The support page about deleting a Pokemon Go account has similar wording: How do I delete my Pokémon GO account? — Pokémon GO Help Center