How do you justify that ? Things that are emergent have to emerge from something, that is implied in the word, they cannot be unconnected. Could you build a house without lots of building blocks ? Could we find an ecosystem that had no living things inside it ?
Yes I have no argument about the connection.....But what is it? A wheel and a crank are joined together by a crankshaft. But what is the link? Another level of organisation?
Also how do we go from the connection to the emergent property which must be separate?
At the moment we have nothing but the emergent just appearing without adequate explanation from the previous level which does not have the property. Particularly in the case of consciousness. We are therefore in a very real sense left with something hanging there.
These, so far, are the facts of the matter and so far any complaint about it from the reductionist is from dogma.
I am not against a direct connection from the previous level but I am not convinced by your ''take it on trust'' approach.