Lesh18, on 2012-February-18, 22:53, said:
8) To me as a beginner it rather seems there is little scope for free action in bridge. Every piece of the game (to be played well) is pre-determined by rules (convention, bidding, playing tricks). So what bridge really is about as far as I am concerned - just to master bidding system and conventions a get a partner who also mastered the system - so you have the best chances regardless of the hand dealt. Am I wrong?
This is not true for a number of reasons.
First, as some have already mentioned, you have the flexability to bend the rules when your experience tells you that it is warrented (which often falls under the title of "upgrading" or "downgrading" your hand because of things like suit quality, shapeliness, controls, quacks, etc).
Second, there are often multiple bids that will describe your hand, and your experience will tell you which bid is more likely to help your partner make the correct decision, or lead to fewer complications later on, etc.
Some of these are prety cut and dry. For instance, most people would recognize that with a 5 card major and a 5 card minor, it is better to open the major (fewer rebid problems, more descriptive, more relevant to the likely final contract, etc)
Others are such complicated questions that even experts don't always agree. For instance, with a 5 card major and a balanced hand, is it better to open 1M or 1N? This requires a lot more experience, and the correct answer will depend on your system, the suit quality of your major, controls vs slow tricks... the list goes on.
So there is actually quite a bit of scope for "Free action" for players who have a good grasp of bidding, but most people seem to think that beginners are best off learning as few exceptions as possible in order to simplify the bidding. This is why some teachers will teach "always open 1M with a 5 card major and opening values" or "Always open 1N when you are in the point range and have a balanced hand". Chances are neither is correct 100% of the time, but the gains from simplicity are usually thought to outweigh the gains from flexability, at least until the player is advanced enough to make useful judgements.