Cecil: How hard is it to hunt a lion?
Answer: Not very. You don't even need to get out of your car. Just go to a national park where they ignore people in vehicles.
Here is Cecil in 2014, with two tourist vehicles (and two more out of shot), resting in the heat of the day. Standing up occasionally, turning around, yawning, lying down again and going back to sleep. Just like cats the world over.
The real challenge is to miss a shot at this range and to have to spend the next two days trying to find a wounded lion that has gone to ground, so that you can have it killed properly, beheaded and skinned. Giving you "hard-earned" trophies as proof of your derring-do.