Do the job without dex?

Excuse me, could you elaborate on the phrase 'do the job without dex'? In the realm of cryptocurrency and finance, I'm curious as to how this might apply. Are you referring to executing transactions or managing portfolios without the use of decentralized exchanges, or 'dexes'? If so, what are the potential benefits and drawbacks of this approach? And how does it compare to utilizing traditional centralized exchanges or peer-to-peer transactions? It would be greatly appreciated if you could expand on this concept and its implications within the industry.