Everyone perceives entrepreneurship completely differently, and the weight of certain challenges varies from case to case. You always see things differently depending on the stage of life and business you're in, because your position is different each time.
When I was a teenager my biggest problem was "What will people think of me when I will start doing this?"
In my early twenties my biggest problem was "What if I can't figure out accounting, taxes, legal stuff?"
Now I have a different problem how do I scale something?