all is fish that comes to the net

Anything that comes along is accepted and turned to advantage: “I don’t know that she cares for one more than the other. There are a cou- ple of young Air Force chaps too. I fancy all’s fish that comes to her net at present”
(Agatha Christie, Murder in Mesopotamia,
1936). First recorded c. 1520, the proverb is sometimes applied to a particular person by substituting my, his, her, and so on for the, as in this example.
Proverb expressing similar meaning:
all is grist that comes to the mill.