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

Read also:

• Why does it itch on my vulva, uterus, and sides of my vagina, but it doesn't itch inside the vagina?
• How do you take your erotic photos and how do you choose the poses?
• The AI-generated ad that aired during the NBA finals took $2,000 and 2 days to make - Mashable
• Do snipers lay on top of tank turrets during combat?
• China extracts critical mineral rubidium from brine for first time - South China Morning Post
• If my boyfriend watches porn, does it mean he doesn’t think I’m good enough? If I am good enough, why does he still watch? Am I not beautiful enough?
• Why cant I stop thinking about counsellor between sessions?
• How can I move on from my ex?
• 2 women diagnosed with colon cancer in their 30s share their symptoms that were missed - Business Insider
• What is the story behind bhai dooj?
• What should I do if I love someone who does not love me?
• If you were president, how would you make America "great again?"
• Teens like me, what are your expectations when entering adulthood?
• JWST spies frigid alien world on bizarre orbit: 'One of the coldest, oldest and faintest planets that we've imaged to date' - Space