TrueCrypt-VeraCrypt

With SecureBoot, Windows can verify that the OS hasn't been compromised by scanning for bootkits before the computer boots. This validity is achieved through a secure chain of trust from the BIOS to BitLocker. 
This functionality is critical for preventing an entire category of attacks against Windows. These attacks are not theoretical.
See: https://decentsecurity.com/securing-your-computer/


3rd party encryption tools such as VeraCrypt for OS FDE break this chain of trust.
Regarding encrypted containers, Windows can also do this natively with the EFS feature. 
See: https://www.thewindowsclub.com/encrypting-file-system-efs-windows-10