Why is it so hard to balance on a bike?

Have you ever wondered why it's such a challenge to maintain your balance on a bicycle? Is it because of the design of the bike, or our own bodies' limitations? Could it be due to the lack of stability provided by two wheels compared to, say, a car's four? Perhaps it's a combination of factors. Whatever the reason, mastering the art of cycling can be frustrating at first, but once you get the hang of it, it becomes second nature. So, what exactly is it that makes balancing on a bike so difficult, and how can we overcome these challenges?