In the earlier era of mainframe computers, developers needed to wait of their turn to punch in the code and get the compute time. Personal computers brought the decentralization of compute and storage.
However, the Internet is still centralized and prone to censorhip, rent seeking and introduction of fake products and persons even on centralized systems. The centralized system act as a middle men - seeking rent , without much of the due benefits accruing to the end consumer or the supplier.
One of the pertinent example are the aggregators be it in ecommerce, ride hailing or service sector. The aggregators first build up the base by providing huge discount and running the company at loss with fresh capital infusion, though free cash flow is very less, just on the assumption that fresh capital will be brought to provide exit to the earlier one.
Blockchain emerges as a decentralized Digital Public Infrastructure without any gatekeeping, censorship and rent seeking by the centralized authorities, while at the same time immutable ledger and attestation network based reputation weeds out the fakes.