I like the feature, but if it requires somebody to creates an account, it's a hard sell.

If they got a signal account, which is more likely than a bitwarden account, I'll ask them to use that. If they don't, then something like 0bin.net will likely be easier to use (no account necessary, just copy/paste).

Now, bitwarden allows you to send any type of file, which is better than 0bin, being very limited in size, and to text and pictures. But you need a pro account for this.

So I'm not sure how it's better than the competition. Although I'm posting this comment so that someone on HN can show be I'm missing something.