I do understand what they mean by 'solvent', but that term is so vague it encompasses many different chemicals, lots of them which nobody would clean their computer with. I've never had someone use such general terms as 'solvent' to tell me how to get off paint, super glue, etc. The person usually just says what product they intend to say.In the context of cleaning, you know exactly what they mean as "solvent".
Same thing if you get your hands dirty with paint and someone tells you to use a solvent to remove it, you know they don't mean water.