No… how do you read that in what I wrote?
As soon as you as PIC confirm traffic in sight you also assume responsibility to maintain separation from that traffic. Nothing else. I think that is pretty clear from what I wrote.
In IMC or in case you can not see the traffic you tell ATC “negative on that traffic” or in case if IMC you tell them that.
ATC may in the first case give you another pointer a little later or they may give you a recommendation to alter course or altitude to avoid a conflict.
Obviously in IMC you have no chance to see the other aircraft from a safe distance so ATC will have to ensure separation by radar observation.