Query Re: 'Show Clipping for Black/White Points'

Good morning.
Please can anyone help me with a query.
I have recently come across the 'Show Clipping for Black/White Points' in Levels and Curves and it's driving me mad!
Until recently, I have always opened raw images in Camera Raw or Lightroom, checked for clipping there, and if need be use the recovery or blacks sliders to recover detail. I then open my 16 bit image image in PS in ProPhotoRGB, using levels to make any alterations. I would check to see in the histogram if all is ok and left it there. It all felt pretty straight forward.
Now though I've taken to holding the alt button and going through each channel only to find that clipping occurs every time I begin to move the slider; however small.
The only way I can avoid this clipping is by leaving the levels bar alone altogether. Then there is no clipping in any channels but the image looks flat, and the histogram shows up big gaps on both sides (at least to the naked eye).
I always thought the idea was to move the sliders so there aren't big gaps on either side.
But if I move the slider say from 255 to 254, a red dot will appear, to 250, a few clusters, and by the time I've adjusted the levels to where I think it should be at 230 (based on the histogram) there will be clipping in all colours, all over the place!
I don't know what I'm meant to do. It's more frustrating because I thought I had dealt with the clipping in Camera Raw. Is there a way to avoid this whilst still moving the sliders to where I want them to be?
Thanks for taking the time to read this.

c.pfaffenbichler wrote:
So why are you pressing alt when dragging the Levels handles if the information this provides is not to your liking?
Good point! That's what I've been asking myself.
I think I was happier when I was blissfully unaware of clipping, brightening away to my heart's content! It feels as if the more I discover the less I really know.
Thanks D Fosse for the tip on curves. Much appreciated.

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Query Re: 'Show Clipping for Black/White Points'

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