Why do so many photographers want to use presets? Do they think it will save them time?
No, they know it can save them time. I haven't had to purchase any, but I've been tempted to more than once. There are times when I edit one image and apply those settings to the series/burst. These are exactly the same as presets. You want to have some consistency between your photos in series.
The more presets you use the greater the chance of error in using the wrong preset. Presets are not perfect. Chances are very high that you will still have to edit in post.
The key to saving time is capturing the image properly. Then, it would be rare for a preset to ruin an image. Culling your images to focus on the better one's will save more time as well.
This might give you more preset keepers, but it is a question of chance. If you have the right scene with the right exposure, your chances might be high. But that is already 2 variables.
Ruthlessly culling images would save a lot of time and makes presets more efficiently if you save those that have the closed look to you preset. But that takes a lot of memory and skill. Using presets on a mismatched photo can induce noise.
I have my presets organized in strength/impact. The first folder (stage) is for camera profiles, the second is for manual lens (adapted) corrections, and the third is creative. That generally just leaves me with a few histogram adjustments. Everyone has a different level of skill and experience with their editor.
You would need a lot of presets for all the combinations of scene types and exposures. Using the histogram changes the exposure which can induce noise.
I know photographers who edit every image in Photoshop one at a time, and with great efficiency. It doesn't matter how you get where you need to go, but I do think presets and actions would benefit most users.
They might benefit pros in a production shop who use a room full of editors to send out for publication. I am an amateur and there is no pressure on me. I only PP those photos that I have a high chance of using soon or I PP as needed. It worked fine for me when I was selling prints.
I believe in an even simpler version of the KISS principal than the post above you. I use the finest version of Jpeg and the Standard profile option. This gives me the greatest flexible outside of RAW to create the look I want in post. Why be controlled with one type of cookie cutter and maybe have to backtrack?
I use my presets as a fast-forward. I really don't care for Adobe's built-in settings or profiles. There are times when cookie cutters make sense. You don't want children fighting over the last cookie because one is larger than the other.
I don't like cookies with the wrong kind of frosting on them.
When it comes to lightroom presets I did make some of my own actually. They are pretty subtle, just some small changes to a few settings that would be the minimum of what I would apply to just about every landscape image. It helps me visualize what I need to do quicker, as it changes several settings all at once, and just about allways gets me closer to my goal. In the few times where it doesn't I will probably acknowledge that anyways.
Do you have different ones for various daylight and low light scenario where the light intensity and direction varies? Seems complex to me.
I think it would be hard to have presets that would be much good for the photos below. Two were edited manually by me.

Unedited

Backlit and edited.

Edited
May I ask. What color profiles did you use for these?
The top one is scanned film. The profile was Fuji 100F. The scan is neutral. I never ask for any scan enhancements other then dust and scratch correction.
The second one was taken with a Canon 80D, Auto AWB, the default STANDARD picture style.
In the last one I used an Olympus 8080CW. Auto WB, the default STANDARD picture style.
I always use STANDARD(closest to a blank canvas) since I am an amateur and I am not in a hurry. I like to determine my own 'look' from the beginning.
I never use any imported profiles or presets. I can do almost anything in post that a photographer can do in-camera
I hope that helps. I never try to duplicate a "look".
I think presets work the best when the scene lighting is average(18% grey) and is coming mostly from behind(4 o'clock to 7 o'clock) as in the two photos below. I think it should result in a lot less PP.