Paul’s testimony about his revelation of the living Christ and how he was totaly undone and that his character was transformed in an instant is proof of the resurrection much more than sufficient.
Abram also was totally undone when God spoke to him.
Isaiah as well.
And he stated as much.
One cannot have an encounter with God and come away unscathed.
In retrospect, those who come away with stories of having talked with God like a friend and God asking them for their advice, are deceived and liars.