Please stop hyperventilating for just a few seconds. Feel better?
Now, let's remember the detail about Trump grabbing the wheel of the vehicle is a minor one. Hutchinson's testimony would have been just as damning without it. The more important detail, corroborated by Engel and Trump himself, is Big Fat Don's desire to march with the armed mob to the Capital. Let's also remember, as far as I know, no one disputing the account Ornato told Cassidy about has done so under oath.
What we have here is a repeated, concerted attempt to smear Hutchinson (or in this case the committee) in order to obfuscate the importance of her overall testimony (and their work) because it blows up many aspects of the narrative defending the Orange Messiah.