Because the Special Editions aren't for you. They're an advert for ILM's services. The target audience is movie makers, producers, directors, executives etc. They can see all the whizz-bang effects that ILM are able to produce - and how they can revitalise old movies.

But that shot just looks awful.

And also a warm-up to see what ILM could do in Episode I. The people working on the SE pretty much rolled right into working on TPM when it was finished.