@Peter *******
that's definitely not a good advice.
You're paying an agent to do their job, as professionals they tell people what to do in order to make sure 110% that they get their visa approved, and also make sure they keep their reputation with immigration for sending serious applications.
Why would you hire professionals then if you're not listening to their advice?
It's as if a plumber tells you that you need to pay extra as they need to buy a new pipe and you say "I am the customer I know we don't need a new pipe" and then complain that there is a leak lol