Why Is Friar Lawrence Guilty

Friar Lawrence is guilty because he does multiple mistakes that proves him guilty , and here are his three strikes. Friar Lawrence is guilty, but in another article I read, I do hear a lot of other opinions, but this is what I think about the book.

The first thing Friar Lawrence did wrong was he trusted Juliet to take the potion, plus she was a minor. Juliet was willing to do anyway, and he let her know not to sell to a person to her age, and he does it anyway for asking for the poison. “She will kill herself rather than marry Paris. The friar proposes a plan: Juliet must consent to marry Paris; then, on the night before the wedding, she must drink a sleeping potion that will make her appear to be dead” - (act IV scene I )
Second thing