Voting Based on Conscience Not Allowed

If our elected representatives are not even allowed to exercise their right and to make their own stand on certain issues, then why is there a need for someone to attend the Parliament sitting?
THEY MIGHT AS WELL AS STAY AT HOME! Do not and will not discuss and debate, what is the point of stating your viewpoints when you know you have to follow the decision of the Whip?

If there are any issues to be debated, the Barisan Nasional backbenchers would have a standing instruction( like the Standing Order used in the banks) to

i. support any motion tabled by the ruling party a.k.a their bosses
ii. reject everything else as long as they do not come from the ruling party

Therefore, there is more to the reason why we should strengthen the Opposition.