Trading currencies is basically zero-sum. A VEF/USD seller needs a USD/VEF buyer. That buyer demands some VEF for each USD i.e. the floating exchange rate. In a free market, imbalance in the foreign exchange flows either reduces the exchange rate, or forces the issuer to take action by supporting the market at the desired rate with USD reserves, or offering higher interest rates to attract more dollar demand, etc. All of those are expensive, so some issuers might try to prohibit foreign exchange at rates less advantageous than the desired rate. Circumventing that prohibition (i.e. capital control) lessens its effectiveness.
None of which is to say that capital controls are a good thing, but you can understand how a government might want them, and might view circumventions as 'distortions'
None of which is to say that capital controls are a good thing, but you can understand how a government might want them, and might view circumventions as 'distortions'