Some of the reasons listed as to the reluctance of towing companies to participate: - the heavy truck towing companies get much of their business from the truck industry. If these towing companies were to tow away these heavy trucks, they may lose much of that business. - many of the towing companies support the freedom convoy and their participants - fear of violence against tow truck operators if they try to tow away these trucks
see https://www.cbc.ca/news/canada/ottawa/ottawa-protest-truck-t...
the police and government had ample time to prepare for the protest.
They should have restricted vehicle access near Parliament Hill once they heard the protesters were heading to Ottawa.