Why are some excellent Lightroom tools not replicated in Photoshop?

I am sat here editing my photos of Santorini. Nearly done which is good. I have been going into Photoshop to remove primarily sensor dust spots, but also stuff creeping into the edge of a shot, and also stuff I want removing.

Take this photo of Fira for example - there are all sorts of bits that need consigning to the shadows as they don’t add to the image - they just distract.

This is the final image.

Fira sunset snippet after 01112018.PNG

I do this work in Photoshop and then save the image back into Lightroom.

I then have to go back to the Spot Removal Tool in Lightroom to check to see if there are any bits left that I have not done - there is an excellent feature called Visualise Spos bottom left after you select the (much improved) Spot Removal Tool.

Fira sunset Visualise close up 01112018.PNG

This is the spots that required removal after the work I have done in Photoshop - quite surprising!

Fira sunset snippet Lightroom visualise after 01112018.PNG

The small circle are spots that I have removed.

The question is this - why is the excellent Visualise Spots feature not available in Photoshop?

And while I am on the subject why cannot I not use the Page Down key to navigate through an image like I can in Lightroom?

There are some execllent features in Lightroom thaht would make Photoshop so much easier to use.

Rick McEvoy Photography - Photos of Santorini