[Perfectlap]

few questions:
so you were driving below the speed limit and spun, it happens. I've done it,
too much throttle when the steering was slightly turned but....
May ask you how cold it was outside in farenheit? and were you using
all season or winter tires? When did you last check the air pressures?

personally I would question and possibly fight the ticket. Did you tell him how fast you were driving? How was the officer to know that you weren't a victim of an equipment failure? He doesn't know that...

Is it possible you had a tire failure that was the fault of the tire manufacture?
Possibly a suspension failure? I had a shock fail on me only one week after installation. My fault? nope. I think the officer made a conclusion to blame you of "careless driving" a bit too prematurely.

To blame you for the accident occuring at all, is fine because you ended up in the ditch all by yourself but to cite you for "care less" driving seems like
bull to me. And makes me wonder if they will send your insurance company a bill for all those emergency crews, over time or whatever they do up there in Canada. I might have been inclined to cite you for inexperienced Boxster driving.
That doesn't have points, just a big repair bill.
Take the advice and join the Canadia Porsche Club and spend some time autocrossing. Know the limits of your car before you drive in cold climates.
and if you are driving on the wrong tires during winter you are very very lucky
to be alive. I was on a Miata forum a few years back and one member ended up in a ditch just like you did and did not survive. His passenger walked out fine.