For any given ticket, unless you remove all creativity for an engineer, they will have to balance how deep and how wide they go, how much they refactor, and how much they skip, in order to be effective and not end up with a contraption that's extremely high risk to review and roll out to production: all of that is scoping.
If you are not doing that, you are being micromanaged and I feel for you in your engineering job.
And trust me, non-technical PMs are ill-equipped to figure out an incremental path to that North Star product or feature you want to ship — how you split branches and deliver value incrementally is something only a good engineer can do (well).
If you do not consider how an implementation will affect the user, you might just satisfy the requirement with an actually terrible experience (but the ticket never said it needs to load in under 30s and with no visible redraws and jumping elements): a good engineer will implicitly consider all of these, even if unspecified in a task (and many more, I only used an outrageous example to make a point).
Breaking down problems is certainly a life skill, but engineers are inherently good at it: it's the very definition of an engineer, and you can't be one without it. I have however seen PMs who mostly channel and aggregate customer experiences and stakeholder requests without an ability to consider (broken down, stepwise, incremental) paths to completion.
If you are good at all of these, you'd likely be a good engineer too: this does not mean that one can't be good at PM without being an engineer, just that a great engineer is very close to being a great PM too.
I am not against the division of labour and different motivations driving where each person invests their time, but if we are talking about a great either PM or engineer, they are pretty much of the same mindset with focus on different parts of the job that needs to be done — 90/10 split vs 10/90 split (and anything in between).
And finally, whether you are a great craftsman at engineering (or PMing), it is slightly different from a great engineer.