I agree with what you said that both are very necessary and inseparable parts and very important and very interconnected. It is indeed very difficult not to have a relationship between them. If they really need each other by themselves, they will always be one unit to need each other.
That's exactly what I meant. So therefore we cannot survive without mining although we are not doing it. Crypto market can be shut down if mining stops. To understand this phenomenon, pretend the internet goes off in all over the world, no one could connect to the network by their nodes.
No one can add any transactions, or create new block etc. Thus no one can make transaction either, no one can use exchanges or dexs whole market will shut down same thing can happen but only few things might be working like maybe exchages will be working.