Don't be pressured by people who think every picture needs 'tweeking' to make it 'perfect'
I think there are more 'you should get it all right in camera' as opposed to any 'you should post process' posts.
You do as much or as little post processing as you're comfortable with. :shrug:
It's obviously preferable to get an image as best you can 'in camera', but don't be fooled that you're not doing any processing should you print straight from your camera.
If you shoot Jpeg, you, or your camera, has decided on a picture style, Landscape, Portrait, Vivid or whatever, that has altered reality. There has been contrast and sharpening applied. If you have shot B&W, you've already altered reality. We don't see in B&W after all.

If you have used filters, you have altered reality. That some of these changes were done before the light entered the lens make a difference? :shrug: It does to some.
Even with film you made decisions which affected the image to a greater or lesser degree. You chose the type of film, which affected the colour reproduction, or you used B&W, which has again altered reality. Processing the film was subject to changes during the developing process because of strength of chemicals and time of development. If you did that yourself, then you had control of that, if you sent the film away, you had no control over that.
If you received the prints back, then the company altered the images during printing. The machines used averaged out the exposures during printing to print 'correctly'. I know I had the odd print that was grainy because the image had been taken underexposed, and the exposure altered when printing to give a better print, at the expense of grain, just like the 'noise' now.
If you printed yourself from the negatives, by printing lighter or darker prints, dodging, burning and whatever else you did you were changing the image further and further from 'reality'.
Slide was the most pure and unforgiving medium, but obviously filters affected the recorded scene as before. (and now)
Unless you're Journalist, or are claiming that the final image was as it was straight out of the camera with no post processing, then the final image is what counts and how happy you are with the final image and how it was achieved.