In my opinions, it defeats the very purpose of stock market. Markets play the critical role of price discovery,
one cannot pick only the good side while rejecting the down side that comes with it. Putting Long Only conidtions on investors/traders or banning short sellers-If something is worth/devalued currently, propping it artificially/interfering doesn't change it's value.
Think of this analogy- a person is totally drunk-next is he has to sleep, go unconscious for a while-get a hangover before he gets over. Or you can make the drunk person not fall asleep, in fact push him to exercise so that he stays awake. What do you think, happens and which is dangerous?
Simply put, if governments start interfering, why even have price discovery/stock market- the government could publish the index data like a economic metric every month or a week like the CPI-IIP etc...