Just apply those changes: https://bitcointalk.org/index.php?topic=5496494.msg64205870#msg64205870

Then, you will produce valid blocks locally. Getting it globally confirmed depends on your luck (if you propagate the block faster than other nodes, and if ASICs won't reorg it).

Of course, because in this way, you can get the most coins, out of the system, by using consensus rules in your favor. Because blocks with minimal difficulty are easy to mine, and push the timestamps forward, so that ASIC blocks can bring back the time to the past, and then, you can mine blocks with the same timestamps, over and over again (which is exactly, what you can observe, if you just look at block timestamps only).

So, people are just maximizing their profits. I estimate the equilibrium is somewhere around 1/6th blocks, mined by ASICs, which means around 83% CPU-mined blocks (which you can easily challenge with any CPU, as long as ASICs won't reorg them).