this checks out to me ive always noticed that i tend to write at greater length than most people i knew and with much longer or more complex sentences in part it was interest in writing—i wanted to write better so i learned how the parts worked and that can pretty easily take you to dickensian paid by the word levels of verbosity but then it also naturally leads to the ability to make a sentence like this one right here grammatically sound well more or less certainly within creative license bounds if not style guide standards but even before i could do that the length would go on theyd just get called run on sentences because just commas cant fix that unless youre a founding father which leads to other problems i was also directly called out on writing the way i talk so your hypothesis lines up pretty well the thoughts are a bit more stretched out sometimes and possibly convoluted—you want to show the whole process until you learn not everything needs said—but you still want to get it out so you use the tools you have and everybody at least knows commas  eta to be clear i tried intentionally to use long sentences if anyone has a problem where they need to control that habit you absolutely can most things with more than one comma that arent lists can be said in multiple sentences its up to you and your particular situation nwhether they should be