Is there anything that could take meat's place? Presumably we wouldn't want to just eat a lot more carbs and instead eat something that's got a similar amount o

Is there anything that could take meat's place? Presumably we wouldn't want to just eat a lot more carbs and instead eat something that's got a similar amount of protein (the thing that seems to make meat nutritionally unique). Legumes of all kinds seem to give me and a lot of other folks digestive issues.