When you can make a game like this, you criticize the methods of others.
this is a visual novel this is literally as easy as downloading renpy and putting in any random story
They didn't criticize one way or the other, they only corrected you.
That being said though, you don't need to be a chef to say that the food you were served is good or bad. The same is true for everything, art, movies, games, writing, etc.