If the disk is encrypted (and it should be) and the encryption key is stored in a secure enclave (like the T2 chip) or uses a machine specific key (UID), then having removable or swappable storage isn't helpful either.

In either case, you're not accessing any stored data from a broken Macbook.

With proper encryption solutions there is always a way to have a backup key printed out that's used when the drive is in another system.