I agree there is a risk of the repair failing, but not necessarily.
However, if it were me, I would not toss it or consider it a complete goner. You can use as a spare, or in a less risky place (basement or such), with the filter placed within a plastic pan.
In addition, I would attach an additional piece of plastic (on the outside) to give the edge-to-edge join repair additional support.
From what I see, the break did not occur in a place that is generally subjected to particular strong stress force. Just my (humble) opinion.
Good luck!