With respect to the blockchain, almost all of the technology is available before bitcoin, but no one thinks it works until bitcoin, so bitcoin is the first successful application of blockchain technology. To the extent that bitcoin is the first blockchain there's nothing wrong with it. If you want to understand the blockchain technology, Bitcoin is indeed a thing that can't go around.
blockchain uses a decentralized system that wants efficiency. When someone buys a bitcoin coin, the computer system connected to the blockchain network will record and provide validity automatically. So, minimal error, fast, cheaper and easier.
while Bitcoin itself is the first currency that runs in the network without the need for central mediators or publishers thanks to the decentralized blockchain.