Now the only thing you need to do is descend to 3m(10ft) reference a point and hover at that depth, without moving backward or forward, without moving your hands or fins, while staying in more or less (we are talking rec pass her) trim. Do that for a 3 minutes and see where you end up.
Looking at GUE standards it says "within 5' (1.5m) of target depth for Rec Pass and (3' 1m) for a Tec pass". By within it could be intrepeted at +/- so in theory you have a window of 10 ' or 6 feet depending (although my impression is that instructors use the standards as a maximum window)
By contrast BSAC black standard is 23" (Plus or minus 0.3m 11" from target depth - like GUE task loaded) GUE aren't the only agency that require good buoyancy.
But you are absolutely correct that taking the course should be worthwhile to most people, I've heard lots of stories of experienced divers/instructors getting a provisional on first attempt. On paper the standards aren't that onerious. The reality can be very different.
I'm excluded from taking the course because I smoke, however if I were able I would becuase my personal opinion is that you can always benefit from training and its great to learn different perspectives. And apply them as necessary.
People often ratonalise courses in monetary terms too. Some might say XX course is not worth it, because they can't justify that expenditure form their disposable income.
To me, the price of the course quoted by the OP isn't excessive, I've spent a lot more than that on further training this year. However in a previous year I would have viewed the courses I've taken as not that important becuase I might have not had the time nor finances.
Others here however might view my courses as a waste of time and money to them..