The most attractive part about blockchain is the decentralized ledger showing each transaction made.
This is probably the key thing. Let’s say that you wanted to purchase a home in Turkey but you live in Canada (just play along). A transaction on the blockchain can show a verified transfer of funds, record the purchase and act as proof of ownership.
As you mentioned, the big issue is computational expense.
I hate bullshit clickbait like this article. These are horror stories about sex trafficking and slavery, not about OnlyFans. Crap like this is what killed Craigslist’s adult personals. At the time, it had become a tool for sex workers to come out of the shadows and be free of pimps and slavers. All the closing of Craigslist’s sex work section did was hurt sex workers. Articles like this aim to do the same to platforms like OnlyFans.