Let me explain:
Why not use the “Send” feature? Because Bitwarden is a place to store sensitive data, and part of keeping that data secure is ensuring that others don’t even know where you store it. When you use the “Send” feature, you’re essentially revealing that you use Bitwarden to store sensitive information. If you’re using a self-hosted server, it’s even worse—you’re directly exposing your server’s address.
(Some may argue: “But I only use ‘Send’ to share with trusted people.” However, this significantly reduces the usage rate of the feature, potentially turning it into an edge case that no longer justifies the cost of maintaining it.)
Why suggest a feature for syncing contacts and calendar information? Because, like passwords, this data is sensitive and not typically shared with others (with the exception of enterprise use). It also needs a secure place to be stored. In fact, one could argue this data is just as important as passwords. Currently, the ability to sync such data across devices is almost entirely monopolized by large commercial companies. Our self-hosting advantage gives users true choice—something those companies simply can’t offer.