I came across another thread that is very informative about the assisting process. It is for geese but applies to all eggs. I really liked this statement:
"We do not follow the school of thought that chicks that are unable to hatch are best left due to a weakness in the chick or their bloodline. This sweeping and erroneous statement does not account for healthy chicks previously hatched from the same parents. Hatching delays are often the result of slightly imperfect incubation techniques and this should be taken into account. Yes, sometimes chicks are weak and there is often mortality under the parents, nature does select for the strongest. However if we are to employ artificial incubation techniques then we must accept that as owners we are capable of making errors and at least give these chicks the opportunity of life before assessing their worth later."
https://www.backyardchickens.com/t/491013/goose-incubation-hatching-guide-completed
Amy, hope you don't mind I'm adding the link!