Will Bitcoin ALWAYS be decentralized?

Imagine a scenario many years into the future where the world has adopted Bitcoin as the primary currency. Given the continuous addition of transactions to the blockchain over an extended period, the full node might grow to hundreds of thousands of terabytes in size. In this hypothetical future, only massive data warehouses might have the capability to store such a gargantuan full node, potentially leading to a situation where there are only a few entities globally that maintain the full node. How can blockchain handle this? I understand there is sharding, but sharding also results in fewer entities holding any specific shard, resulting in a lack of decentralization.

tldr: Currently, many users can hold the full node of transactions and the blockchain is widely decentralized. But in the future, the chain could become infinitely large and only giant storage companies and governments will hold a copy of the full blockchain and potentially exploit it. Am I wrong?