Things can co-exist together, not all the market takes a share from other markets, sometimes they create their own market which means there is also no need to be worrying about cex and dex or cefi or defi being so different from each other but growing all at the same time, because they can co-exist together.

Literally this is not something I would be knowledgeable about to comment on in an official situation, I am not an expert at all, I have been in crypto world for over 8 years now and I can tell you one thing I learned ; anyone can be wrong. However look at all the crypto coins coming into the market, they grow and become big, but bitcoin keeps growing big at the same time as well, one going up doesn't make the other one go down, hence I believe defi and others could do the same.