Yes. The difference is nobody that matters cares (or reacts) to our opinions. The AP poll gets entirely too much run & weight. I could not care less what 60+ journalists think about who's good at football. It's "interesting" info ... equally as interesting as the "opinions" folks who post here.
Correct. Computer algorithms/calculations can & do ... do a better job figuring out which teams are better than the next. Not perfectly... which is quite alright, but way better than a guy/girl trying to parse which team should be 14th or 23rd.
Even the CFB playoff committee claims to use statistical models to inform their rankings. The AP poll doesn't have any criteria applied to it as far as I know.
Imagine a world where no rankings are referenced or calculated or voted on before 6 weekends of football. How would we know which games are "marquee" ... How would GameDay figure out where to set up their show? People would be lost.