I disagree. It's not even a little easier.
Let's say your friend on Facebook really likes your post, and want to upvote it by sending $10 to a bot. That would give you a nice boost in payout and more post visibility, resulting in more upvotes and followers on the platform.
If your Facebook friend opens an account, he'd have to purchase SBD through a trading platform that accepts FIATs, then send it to you just to say "awesome post, it helped me a lot".
That's a ton of work and good luck explaining this process to your average Facebook user who has zero clues about cryptocurrencies and think FIAT is only a car brand.
I propose some kind of built-in mechanism in the blog post page to save people who do not create content having to go through all that trouble. If they do create content? They're welcome to join the circlejerk. :)
Why would it be bad for steem is people pay fiat for it?
No, I don't. I offer converting FIAT to SBD. Currently, people pay SBD for upvotes, and get the value in return in SBD and SP. The investors get SBD. There's no more fluidity that currently exists.