So what, make there be even less incentive for directors to buy...

So what, make there be even less incentive for directors to buy shares in their own company? They already have to deal with only being able to sell during a few specific windows, now you want there to also be a rule that they have to tell everyone first so that the price craters before they get to sell? This is an investment for them as well, not a charity contribution. You'll find as more restrictions are imposed on insider trading directors will just stop buying shares in their own companies because it makes zero financial sense to do so if they're expected to hold forever, and then of course everyone will be complaining that directors don't buy enough shares. They've done well, they deserve to take a little profit, simple as that