You also forget a big word, "abortion". And babies feel pain.
In the making of this vaccine there were no aborted fetal lines. As as been said early testing may have used the cell lines you are talking about. Most pastors have shed their light on the situation. Being a Protestant I understand the faith to be not in news of an intermediary.
And we could always ask the age old Ethical questions about if this confers meaning to a senseless death. Any fetal tissue in early testing was not aborted specifically for this reason. And again in this vaccine there were. No stem cells.
I respect your position but this is a fine of enough line that there are several ethical arguments to be made either way.