The penalty for an accident without a license is, at minimum, driving without a license. You're also not likely to be covered by insurance without one either, even if you're not at fault.
I'm not sure if they give regular state id's as real id.
Also, you don't need "Real ID" to fly no matter what they say. You don't even need a photo ID at all (although they'll force you to waste time if you don't have one. I found this out when I lost mine but still had to travel.)