As I said above, I think Pagliarani is using sophistic techniques to "soothe" the "itching ears" of his audience. Here is what St. Paul said on the subject (2 Timothy 4):
1 I charge thee, before God and Jesus Christ, who shall judge the living and the dead, by his coming, and his kingdom: 2 Preach the word: be instant in season, out of season: reprove, entreat, rebuke in all patience and doctrine. 3 For there shall be a time, when they will not endure sound doctrine; but, according to their own desires, they will heap to themselves teachers, having itching ears: 4 And will indeed turn away their hearing from the truth, but will be turned unto fables. 5 But be thou vigilant, labour in all things, do the work of an evangelist, fulfil thy ministry. Be sober.
Listen at 32:50 where Pagliarani uses St. Paul (1 Corinthians 8) to JUSTIFY the vaccines. That discussion of St. Paul uses the example of "eating meat sacrificed to idols," which is what Pagliarani focuses on. But the main point that St. Paul was making was that a Christian cannot do something that will "scandalize" the weaker members of the Body of Christ. Again, "eating meat sacrificed to idols" was just the
specific example he used to illustrate the
general moral teaching "to avoid scandal."
Pagliarani turns St. Paul's words upside down. With a hand wave, Pagliarani says "scandalizing others is another matter," which he does not bring up again. He focuses only on St. Paul setting up the moral issue by using the example of "eating meat sacrificed to idols." Far from saying that a Christian SHOULD eat, St. Paul says the Christian may eat IF AND ONLY IF it would not cause a scandal for the weaker members.
So to apply St. Paul's reasoning to our situation, using the example of the Covid vaccine, even if the vaccine did not actually contain aborted baby parts (which it does), but some Catholics thought that it did, and we Catholics consumed those vaccines, we would scandalize the consciences of those who thought the vaccines were made with aborted babies. In that case, we must avoid the vaccine to avoid the scandal.
See St. John Chrysostom's commentary on the issue if you are having trouble understanding St. Paul. You can find it here:
https://www.newadvent.org/fathers/220120.htmThe main point is made in the explanations of verses 8:9-8:13 at the bottom of the St. John's commentary.