Why doesn’t Jesus tell any who is in heaven

Why doesn’t Jesus tell any who is in heaven speaking with Him that denominationalism is sinful and that He only established one church (Matt. 16:18; Eph. 1:22-23)? Why don’t people return from the dead with an evangelistic fervor and an emphasis upon truth? Why is there no passion to spread the Gospel when Jesus taught the urgency of such before He ascended into Heaven (Matt. 28:18-20)? These are things worthy of thinking about when evaluating what sincere people are telling us. When studying with someone who has had such an experience, these are appropriate things to have them contemplate.