Companies tend to do the opposite, though, right? Apple could increase its margins by selling iOS and the Ax processor IP. But it makes more “boatloads of money” selling hardware, even at lower margins. Instead of selling IP, Apple uses its superior IP to dominate the market for phones.
Its likely the issue isn’t margins, but scalability. Scaling a law firm is difficult to impossible due to conflict of interest rules. That’s why the largest international law firms have 4,000 lawyers while PWC has 230,000 accountants and advisors. That puts a low ceiling on how much you can scale while doing actual legal work.