Many != all. I'm a senior engineer now only a few years removed from school but I'd never touched programming until my 2nd year in college (switched majors 3 times). I'm obviously interested in tech or I wouldn't be here but I'm certainly not spending my free time trying out new technologies or coding for fun, and honestly I never have. I care about my job, about my craft, about moving up but I get plenty of practice in the 8+ hours i spend every day at work. Outside of work I have a life that doesn't involve machines, and this idea that in order to be good at your job you need to have a burning passion for coding is unhealthy for the field. Not to mention that half of what makes a good engineer is stuff completely unrelated to how well you program.