First because we know it's always a lie.
Sellers have already begun revolting by papering eBay's discussion boards and starting a petition, which has more than 3500 signatures...Alastair MacGibbon, eBay's trust and safety director, said the announcement was designed to protect users as one is four times less likely to have a problem on eBay if one pays using PayPal than with other methods.
You're either foisting off some kind of illegal, anti-capitalist, anti-competitive practice, or you're protecting yourselves or your money. But second because it's not just dishonest - it's a horrible intention for you to have. The excuse you make is even worse than the thing you're making an excuse for. We don't need corporations to protect us. If I want protection I'll put on a condom.
We're adults. You're supposed to be doing business with us, not changing our freaking diapers. The eBay policy might be designed to make eBay's commerce safer, but that doesn't mean it was designed to protect anybody.