Pretty much this.
For someone dead set on not believing, Jesus could descend from the clouds in front of them, convert the ocean into wine, and raise the dead, and they would still try to rationalize it away.
I personally find the strongest evidence to be those cases where there was a documented medical condition beforehand and a miraculous healing cured it. In these cases there’s clear documentation on both sides of the event. However, even this isn’t enough to convince people, because the non-believer will say that we simply don’t know what healed the person, but we’ll figure it out eventually.