I’m hard of hearing, but only in the last ~8 years and I didn’t realize how much I’ve come to rely on lip reading to supplement my loss of hearing. I was watching people on YouTube and I couldn’t understand them because it was quiet so I started watching and realized they were speaking French and how that made it so I couldn’t understand them at all because I don’t know French lip reading even though I can understand spoken French fairly well. But yes some people just can’t speak louder for some reason