I think you are responding to a straw man version of the pro-practical effects argument that no one is making here. Those video comparison don't really add much to the debate. Both sides can cherry pick examples like that. For instance, with maybe the exception of Interstellar (which involved a mix of practical and CGI effects), show me a CGI space battle that looks as good as this shot:
I don't think it can be done as great as modern CGI is. Now, I'm not saying every shot from the original Star Wars trilogy is as flawless as the above. They are not. There are many shots that are not as visually convincing and show the problems of analog compositing and the like. However, I find that modern CGI often gives itself away in the lighting. As CGI has gotten more advanced and complex, objects tend to have too much bloom to them. They glow in an unnatural way (see for example Gravity), which is what I often think of as "CGI sheen" in modern effects driven films. It is just incredibly complex and hard to replicate. Real, natural lighting is hard to mimic, which is one of the greatest strengths of the model shot above. The real lighting helps sell that the models are physically there.
Also, the more of the shot that is CGI, the easier it is notice the effects. With rare exceptions like the new Planet of the Apes films,
I find that the best modern effects try to use a combination of the two and are aware of the respective strengths and weaknesses of both approaches. CGI works best in smaller doses when mixed with practical effects. The practical elements of the shot help confuse our eyes about what they are seeing and sell the authenticity of the CGI. As well, it gives the CGI artists a frame of reference and something to blend their work into. The more of the frame is CGI, the less real it looks. The small flaws of CGI become more noticeable.
With respect to the recent unveiling of Apocalypse which was the impetus for this thread,
I think the reaction was simply just the result of Bryan Singer and Louise Mingenbach's horrible design sense. Don't forget what they made Superman look like... A practical Apocalypse would have looked a lot better if designed by Michael Wilkinson for instance.