Funny how Hebrews 13 v 17 gets trotted out. Just ask them to read Heb 13 v 7 - 9 to get the true context of it.
(nwt 2013)
"7 Remember those who are taking the lead among you, who have spoken the word of God to you, and as you contemplate how their conduct turns out, imitate their faith.
8 Jesus Christ is the same yesterday and today, and forever.
9 Do not be led astray by various and strange teachings, for it is better for the heart to be strengthened by undeserved kindness than by foods, which do not benefit those occupied with them."
Bold italics mine.