nostr:npub1ewkthph6ptey4mwcvmemr6pg5lfms579pgfkz9jetnanrqnnpmzswlwqxy
This is not entirely true, only half of the story.
Linux dose not come with any file system, it's a kernel. It is down to the GNU/Linux distribution maker to choose defaults. PopOS is a good example as it has a full screen dedicated to prompting you to encrypt your drive during install, with a small skip option at the bottom right. Other Linux distro have the options to encrypt the whole drive or the home directory by ticking a checkbox.
On Windows, things are different. "Device Encryption" (not BitLocker, which is only available to pro and enterprise version of Windows) is what you are talking about. It is automatic and unlike Linux, encrypt by storing the key in the TPM, witch means it requires no encryption password for the user. The downside is that if your motherboard dies, you loose the encryption key and you loose all your data. Because this a glaring issue, Microsoft did something even worse. If you use a Microsoft account during install (witch is now forced with Windows 11), Windows will send the encryption key to Microsoft and Microsoft will keep it on their server! Then you can go on your Microsoft account online and recover the key. This means that any law enforcement could get the key from Microsoft. With BitLocker you can choose to set your own password and not send it online, but it is not available on consumer device and not turned on by default. So if you do get arrested, you're better off with Linux.
SOURCE:
https://www.thewindowsclub.com/difference-between-device-encryption-and-bitlocker