The bitcoin blockchain is ~173 GB this year. The EOS.IO blockchain is considerably more capable, hosting accounts, contracts, and user data as well as transactions. The EOS.IO chain size is not out of line with other chains, especially given the transaction rate it is capable of processing. If you wish to run a full node, you are expected to provision accordingly. Full nodes are required to be able to transmit a complete copy of the chain to any connecting node. Therefore, full nodes must maintain a complete copy of the chain.
The feature you are requesting may be suitable for a so-called ‘lite’ node. At present there is no implementation of a ‘lite’ node.