It seems a bit dated too, I definitely have a bitlocker disk mounted right now.
The TPM secure boot key part is true, but you can disable secure boot and use (on Windows) manage-bde to add a password based key. When you boot and it can’t load the bitlocker key from the TPM it prompts the user for a password.
I’m fairly sure there’s a way to bypass the secure boot requirement for Windows 11 too, I think I read about it but I’m not using windows so I didn’t look into it much.