I have seen this advertised by the guys from Tasty Trade for example - I think you reduce the space in which you can make profits and therefore the probability of a profitable trade. What you are buying is an insurance that your original thought of a range bound underlying is covered in case you were wrong, if you change your opinion about that range then the trade as a whole should be questioned. In those case I understand - but note I am far from expert - that its better to move the whole condor up or down as may be appropriate and to do so without delay. With a condor your worry is that one of your legs is going to get punched through so adjustments should reflect that.
Not sure if you are signed up to creating alpha? However if you do look at @SBatch Elephant trade which is a remarkable trade where he picks a range for the underlying (TLT in his case) and through many many tweaks throughout the trade lifetime moves that range if the market requires it basically selling potential final profit in exchange for security that we remain in the profit range. As subtle as that strategy is and as well as it works even then we cannot always avoid a loss due to an unexpectedly large and fast movement in SD of the underlying. There is no such thing as a free lunch.