What are the Arguments that goes Against the idea that Backbench MPs are Influential in UK Politics

-Party Whips are still very much in Control of Voting Outcomes. Backbench MPs may see a loss of Future Promotion if going against the Government. Furthermore its Rare to see a Rebellion to Defeat a Majority Government. -Many Debates that the BBC win time for are in Westminster Hall - not in the House of Commons. This reduces the Status of the Debates, often no Vote too so the Influence is rather Limited -Backbench have less Influence if the Government has a Majority. Rebellions easily more dealt with