Who knows for how long though because, if you read carefully, they didn't promise that it will not be used in the future.
This is conspiratorial thinking, and it's a fallacy called the Argument from Silence (i.e. asserting intent based on what they didn't say). If I say I'm going to give you a handshake, but you say, "But you didn't promise you won't punch me in the face," most people would recognize that as a ridiculous line of reasoning.
Bitwarden has now landed itself in the category of software that I would rather move away from and cannot wholeheartedly recommend anymore. That's pretty sad.
You do you. This doesn't seem all that problematic to me, as I don't need Secrets Manager, and I'll still recommend it to anyone looking for a password manager.
Seems to me that it makes more sense to vilify them when they become villains, not before based on paranoid reasoning that they might.