Yes, but since you are out of business you no longer have an opportunity to fix that situation or adapt it to your morals. It's final.
Turning the page is a valid choice though. Sometimes a clean slate is what you need.
> Being out of business shouldn't be a death sentence, and if it is then maybe we are overlooking something more significant.
Fair point! It feels like a death sentence when you put so much into it though -- a part of you IS dying. It's a natural reflex to revolt at the thought.
> For example, should we let people die rather than use medical knowledge gained unethically?
Depends if you are doing it 'for their own good' or not.
Also the ends do not justify the means in the world of morals we are discussing -- that is pragmatism / utilitarianism and belongs to the world of the material not the ideal.
Finally - Who determines what is ethical? beyond the 'golden rule'? This is the most important factor. I'm not implying ethics are ALL relative, but beyond the basics they are, and who determines that is more important than the context or the particulars.