You keep the recovery codes unexposed to the internet or obfuscated in some way, unlike your usual password.
How is a strong password I used exclusively for Bitwarden "exposed to the internet"? I do see the value of this for people that don't care about security and reuse the same password everywhere. In that case you would need something like phishing to expose the 2FA code or the recovery code, just a leak of the email-password combination from another website would not be enough. But what's the point if I'm already using a unique strong password specifically for Bitwarden?
FYI there is an open source reimplementation of Flash from scratch called Ruffle that should solve all the security issues that Flash had. It runs on WASM so it's compatible with modern browsers. The New York Times is using it to bring back some old interactive/animated pages that relied on Flash.