You can’t share videos via Bluetooth from iOS to Android because Apple things. There’s currently no way to send a video form an iPhone to Pixel directly. And using online sharing platforms always compresses videos.

I don’t see how anyone can defend this in any way

You misunderstand why password managers are a necessity. If a website you are signe sup on get a security breach, your password may be exposed. If you use same password across multiple websites that’s a huge problem. And without a password manager you undoubtedly will be using the same password multiple places.