Bitcoin was floated as a solution for people who were wronged by PayPal and the banks, before the speculators moved in.
As a buyer, I don't care for that feature of Bitcoin.
Why will this be any cheaper, or safer, or fairer with Bitcoin? All the incentives in this business align with the buyer. 90% of the time, I have a choice between many equivalent merchants, all of whom want my business. I will go with the one that supports my cash-back credit card - whose issuer will almost always side with me in a dispute.
Once these escrow services become popular in the crypto world, you're back to square one. The reasons for why PayPal sucks for some of its users have nothing to do with fiat money, and everything to do with the nature of the escrow business. It would be just as shitty for said users if it transacted in Bitcoin, Dogecoin, or silver bullion.
The mediator can decide against your case just like Paypal or Visa can. Even worse, now I have to find some random mediator the seller trusts.
How is that better than plain bank transactions or paypal? The fees are not even cheaper for that "privilege" of having some random mediator play paypal-on-the-blockchain.