SEC Commissioner Daniel Gallagher has given an excellent speech on the titular question. The whole thing is a must read, but this passage jumps out at me:
... sadly, we at the SEC are not doing nearly enough to ensure that small businesses have the access to capital that they need to grow. We layer on rule after rule until it becomes prohibitively expensive to access the public capital markets. Only rarely do we remove any of our rules, even after they have long since ceased to serve their purpose or have become obsolete or worse. And although we have made significant progress in expanding our economic analysis of new rules and rule amendments, we almost never consider how heavily the weight of the entire corpus of rules bears down on registrants.