not the original comment author but I also read most manuals when I buy something. If you buy electronics/products from decent companies, you will be surprise how well the documentation is done.
Numerous times I found warnings of how to use or not a certain product, that further expanded by understanding of how certain things works. Even the most boring product can have instructions that you might don't know and could use to learn them.
Example, my local shop sells tomatoes in a box, written with bold letters, don't store in fridge. I bought from that shop for 2 years, and always store them in the fridge until I took notice of the warning and it pushed me to read why.