This is a line of thinking that's very common amongst people who only speak languages that use alphabets but it's not remotely true. Egypt became one of the greatest empires ever with hieroglyphs and those evolved into a phonetic writing system. Chinese and Japanese of course function and they evolved from pictographs. A pictograph is only limiting if a character that resembles a dog can only carry the meaning of a dog and nothing else. But that's not the case in any language. They all evolved to use the symbol of a dog, or any given character, to carry other meanings.