So according to Merriam Webster bread is: a usually baked and leavened food made of a mixture whose basic constituent is flour or meal
And cake is: A: a breadlike food made from a dough or batter that is usually fried or baked in small flat shapes and is often unleavened B: a sweet baked food made from a dough or thick batter usually containing flour and sugar and often shortening, eggs, and a raising agent (such as baking powder)
And yet some people don't think that cake is bread.
What's your opinion?
I'd say cakes are all bread, but not all bread is cake. Likewise, I'd say omelettes are a type of egg dish, as are plain scrambled eggs, but not all egg dishes are one of those.
If you kept to Western cuisine you could argue bread as a distinct category both within "homogeneous baked goods" or something, but then ingera (for example) would probably end up being a cake, and that's not quite right. It's more important that bread include all solid grain-based staples the world over than that it exclude Western cake, IMO.