Yes, because blockchain is decentralized, meaning the data is stored in multiple areas with many different backups, the data is more secure than data being stored in one location, like a server. If someone tries to alter the data in one block, all the other blocks in the chain can immediately spot the alteration. It has backups upon backups upon backups for data.
Blockchain also utilizes cryptography. Each block has an identifier that’s referred to as a “hash.” The standard length for a hash is 64 characters. Because of this long, completely randomized string, it’s hard to crack into a specific block in the chain to alter its data. And even if you did, since the ledger is distributed and decentralized, and since all interactions with it are recorded, the ledger would have a record of the alteration and could simply correct it.