Why do programmers choose to write their own code instead of using code that is already available online?

Read also:

• Robotic table tennis system predicts ball trajectory and adapts swing in real time - Tech Xplore
• Where's the Civil War everyone on the left said would happen?
• Two Ocean Bands Are Warming Faster Than Ever — What This Means for Our Climate - The Daily Galaxy
• Screen time and physical activity habits linked to adolescent stress and depression - PsyPost
• I have the power to talk to aliens through using telepathy. Why do people think I'm crazy?
• Why do some people feel down in summer, specifically in July and August? What could be the reasons behind this feeling of sadness during those months only?
• Why are white women so overly emotional?
• Gene mutation found in the bacterium behind the Black Death helped plague conquer the world, scientists say - CNN
• While emptying a house, have you ever seen something in it that blew your mind?
• 8 best walking exercises that will help us lose 3-4 kgs within a month - Times of India
• Man called in bomb threat after missing flight at Detroit Metro Airport, feds say - The Detroit News
• Why do many modern Hollywood films rely heavily on CGI and visual effects instead of actual sets? What is your opinion on this trend?
• What would it take for you to consider yourself a "Swiftie" like Flavor Flav?
• What is the meaning of xx in texting?
• What is the process of becoming an Evangelical preacher? Is attending seminary school necessary? How long does it typically take? Is it financially challenging?