Not to mention losing all of your dollars is obviously a LOL reason to stop accepting dollars. In fact, if someone gave that reason you would know there was a lot more to it than they admit or that it was just false.
Dollars are also accepted everywhere, and if they are hacked from your bank account, they are insured and will be returned. Nothing in Bitcoin offers that.
They don't take dollars (usually), they take credit cards. If those are hacked, they are not returned, either (chargebacks, hacked credit accounts, etc). Only checking and savings accounts are insured, but it takes a bit for the money to actually get there.
But, yeah, whatever, "it's just fake money" and all that. Just as fake as the digital 0s and 1s that made up the first credit card accounts. It was just some piece of plastic with numbers on it representing some fake "digital" monopoly crap that wasn't even insured, not the real, actual printed paper money that everyone knew was real because you can touch it. No one accepted credit cards for those reasons, either, and then credit cards failed spectacularly!