Bradskii:
You said it was a bad thing. And now you say, correctly, that we would have no idea.
Yes, what we currently know and understand is speciation is overall a bad thing. Lucy is a terrible argument to hang your hat on. One has to know the starting point to know in your example. It is a useless example.
Good grief.
As you have pointed out, evolution cannot be predicted. But we can see, in retrospect, whether speciation (aka macro evolution), which we now know you accept, has been good or bad.
As far as everything currently alive on Planet Earth (which incidentally you think is 6,000 years old), from the smallest bacteria to the largest animals, the gazillions of life forms existing, it has been a good thing.
I find it difficult to believe I had to point that out.
As far as everything that went extinct, which is by a very large margin indeed a lot more that what is alive today, it was a bad idea.
Again, I find it difficult to believe that was also necessary to point out.
So is that your point? More organisms have become extinct than have not, so speciation is a bad idea?
Oh my word…