I can see you forgot your meds today 
OP, the reason most of those types of people are against photoshop for one or all of the following reasons:
a: people who overuse photoshop have a tendency to take photos wrong (either they don't learn how to properly expose photos, mis-focus or some other error and they over photoshop to make up for their bad photography)
b: they prefer extreme effects (and most old school photographers prefer photos that look like photos)
c: they over process a photo and don't realize how bad it looks
If you find yourself
a: then it's best to listen to their advice, learning how to take a photo is much more important in the first place.
b: if you like extreme effects, no problem. Many won't though. But that doesn't make it bad. It just makes you have a smaller following.
c: This is a category that may photoshop happy people don't realize they are doing. Some will overdo skin smoothing and think it looks great when really they are making their subject look like an alien. Some are over sharpening...gads, it's terrible. Some are over saturating.
In this case, it's important to learn from your detractors. Even if you don't like it, the bottom line is that you'll learn not to overdo something.
Now, I don't know where you fall in this. You may not fall in any or you may fall in all of them. I love photoshop and use it. Sometimes for extreme effects and sometimes I use it extensively and yet people don't know it's been done. Sometimes I make errors but the important thing is that if you want to grow in skill, don't discount what's being said to you. It could actually enhance your abilities if you listen.