People at work keep asking me why I reinvent a few wheels here and there on my personal projects. "Why are you wasting your time with WebRCT? Why are you not us

People at work keep asking me why I reinvent a few wheels here and there on my personal projects. "Why are you wasting your time with WebRCT? Why are you not using phaser.io?" idk man. Computers are powerful. I like seeing what I can do with them.