Freshly ground, careful amount of roasting, proper picking time and storage of beans. Those differences are very easy to taste. If someone appreciates the difference in taste then it is better to them. Why is this a difficult concept to you? Are you trying to talk others out of their preferences and suggest that instant coffee should satisfy them? Are you trying to be a sort of anti-snob? Sounds a little snobby in a different direction.
Update: Thanks for the downvote. I get the message. I should never answer a stupid question. Apologies.
I didn't want it to be great. I wanted to tell the guy the answer he already knows: different coffee tastes different. Can't my comment be just not-great?
Your comment can be damn near anything you want it to be. Do you expect that you should never get downvotes because you don't want them? I don't even understand why people pay attention to votes, but to have such an emotional reaction to the comment score truly boggles me.
Note: I don't expect this to be a great comment either. Downvote away! I honestly don't care.
I never talk others out of their subjective preferences. I don't try to talk my friend out of drinking cheap instant coffee because I dislike the taste of it. That is my whole point; taste is subjective.
Update: Thanks for the downvote. I get the message. I should never answer a stupid question. Apologies.