Terminating the healthy life of those who have not actually deprived the life of others is wrong.
If you only perceive that you will be deprived by letting a healthy life live, then negatively act upon it, you are a slave to your vanity and greed.
All the excuses that you can come up with will revolve around your greedy choices without ever considering the possible prosperity of the other.
Life is precious. Not just yours.