Laws are laws even if we don't agree with them. I wouldn't drive here without a valid license after the 1 year grace period. And I would expect my husband to do them same in the US, not drive if he was not licensed.
The biggest thing for me is the insurance thing, you WILL NOT be covered if you have an accident. It's not just yourself you are putting in danger, you are putting others in danger around you.
Geeta, it's just not so simple as paying out of pocket should something happen. What if you hit a child while driving? They find out you don't have a UK license, it won't just be about money. Jail time could be involved, you going to pay your way out of jail too?