To be frank I am a 30 year old and had to think hard to remember how to burn a cd, and even then. I remember that you just picked the option to burn a cd lol. Remember when you actually needed 2 cd rom drives because images weren't a thing.
I'm about the same age as you and images were a thing. The space of your hdd was probably the limiting factor. I remember ripping and burning DVDs for friends in middle school but it was a juggling act of storage space on an 80 GB HDD
If you wanted to duplicate a CD you'd use a second drive. What I normally did though was rip music to MP3 then write 100 song mix tapes. Before I could play MP3s in the car I did CD to CD copies :)
It wasn't that images weren't available, it was that 700MB was too much for the amount of storage we had. If you had the storage you could write an image