My understanding of most good breeders is they find a female they like, stress the fuck out of it and if it refuses to hermi THEN they will use chemicals to produce the male flowers. The feminised seeds that can be made using this pollen will be very resistant to hermiing.
If the plant hermis through general growing stress and light leaks etc then they should NOT be used for breeding.
However in my first grow a very rare wild pheno was found in some himalyan landrace seeds. This was pollinated by a hermi 8-mile high. I made no plans to take cuttings and so as I had fallen in love with the wild jungli I tried the seeds outside. They were all female plants. I took cuttings and flowered them all inside as well. All but one hermied at some point in and out as I had expected this I removed them in time. The one that stayed female to the end I pollinated with a male 8-mile. Hopefully now I can start to breed out the hermi traits and select for the wild females vigor and extreme branchiness and with a little something of the 8-mile's high.
Seen alot of opinions about hermi made seeds and so was happy to try this out myself. Seems to me you will get mainly females, good chance they will hermi at some point which might not be a problem if only growing for bud but one hermi male flower can mess up an entire breeding project.
Using hermi made seeds will also end up with a lack of males to further a line so back to the same problem, and adding more hermi pollen along the way will not help matters at all.
Seems to me that the magic of breeding cannabis lives in the male plants and being able to spot the male winner is the key to creating better genetics all round.
In fact one of things that attracts me to AUTOs is there resistance to hermiing.