It was to build a popular vote cushion that would take attention away from narrow wins in other states won by cheating. If for instance, it was the other way around and Clinton narrowly won states like PA, MI and WI, any Trump recount effort would not gather steam because she won by such a "wide margin" in the popular vote.
But alas, she did not cheat quite enough in those states as Trump's turnout was stronger than expected.
President Trump will now have four years to clean up our dirty election system. A good start will be to require voter ID in all states, eliminate early voting and restrict those who can vote by absentee. Of course this all needs to be done at state levels but Trump can apply the pressure to get it done.
I believe MI already has a voter ID law on the table and Trump hasn't even taken office yet.
I would focus the efforts on getting the states that formed Trump’s majority to correct their election systems...plus possibly New Hampshire, Colorado, Nevada, Minnesota, Virginia and New Mexico. That would form a solid block of electoral votes that would always overcome the California, New York, Massachusetts, Illinois block.