I have a lot of respect for Lightroom, especially the CC version. It's just incredibly capable software that lets you do a lot of complicated stuff, like panoramas and HDRs with one click.
But there are just some things you can't do with it, and that's where Photoshop comes in. Many photographers, especially those newer to the trade have come to master Lightroom because it has been given the ability to make most necessary adjustments without having to rely on Photoshop. That's why a lot of these shooters are relatively new to good old PS.
(Success Tip #1:Take portraits of people anywhere and turn them into profits)
One of the best examples of how Lightroom can potentially limit you is when you have to change skies. If you haven't already taken a few potentially good shots but with horrible skies, don't worry, they're coming. It's one of those things you can't really change on set.
There's no use in wasting the shot as long as everything else is fine with it expect the sky. That's why I recommend keeping a stock sky selection. I also have a selection of textures and walls that I can use for backgrounds and I generally recommend this to anyone.
(Success Tip #2:Improve your photography with weekly challenges.)
Having a camera with you as often as you can certainly helps gather skies and different other useful components.
Long time Lightroom users that switch to Photoshop for more complex operations like this will find a few differences in the workflow, but there's no need to panic. Working with layers and blending them together is easier than it sounds.
Here is French photographer Serge Ramelli with one of his educational tutorials on how to use Photoshop for replacing skies.
See Full set of tips and teachings from Serge Ramelli HERE.
Learn more about using Photoshop from these recommended books:
- The Adobe Photoshop Lightroom CC / Lightroom 6 Book: The Complete Guide for Photographers
- The Adobe Photoshop CC Book for Digital Photographers
- Adobe Photoshop CC Classroom in a Book