Even with formal training, the presets are nice to 'start from'. If I know a certain preset has the effects I want in it (in Ozone there are about a dozen possible effects) sometimes it helps save time, as opposed to starting from scratch.
Same with any of my effects, as you use them more you'll learn certain presets. Reverbs, mastering effects, guitar amp sims .. tinkering with them over time can be a good way to learn them. The more I use them the more I know about them.
YMMV
Grab a 10 day free trial of Ozone. Try it.
Look at the presets, find a couple you 'kinda' like and see what they are doing. Look at each effect being used (and how). There is a lot to be learned right there.
Then analyze how it can be improved.
Take notes.
I like Ozone. Nice tool. Awful handy to have a collection of effects of that quality that work in one FX slot (grin).
You can have all that and three empty slots for meter, analyzer ... whatever.

I do not work here, but the benefits are still awesome
Make your sound your own!