The only reason I put that responsibility on the manufacturers is it's THEIR PRODUCT! And, THEY are the beneficiaries of the funds derived from selling THEIR PRODUCT to the consumer.
About 40 years ago I designed a coronary artery flow meter to be used during surgical procedures involving a pump-oxygenator, also known as a heart/lung machine. It provided pulsatile flow of oxygenated blood to both the right and left coronary arteries, and provided the technician with an instantaneous readout of the flow to each artery. It was highly accurate, very easy to use, but did require some training in order for the cardio-pulmonary tech to know exactly how and where to connect it to the pump-oxygenator. Unfortunately, because I was an employee of the university, and I designed and constructed the device at their facilities, I could not benefit monetarily from the device. The company that eventually manufactured and distributed them contracted me to provide a detailed instruction manual for the flow meter, which I did, again without any financial gain. However, that company did benefit financially, and because of this they felt compelled to provide a highly comprehensive manual to their consumers. I'm not sure if they were compelled to do this by law.
Now, I can't think of a single reason why an arranger keyboard manufacturer would not feel compelled to do the same thing. If I were the manufacturer of an arranger keyboard, or any product, for that matter, I would provide such a manual. I would want my customers to have detailed instructions of how to get the most out of MY PRODUCT(S). I would want them to be repeat customers who know they can rely on MY OWNER/USER MANUAL for answers to those difficult, technical questions, and those answers would be in plain language that everyone, at every skill level, could easily understand.
I don't want to search throughout every, unknown page in the operating system to find something as simple as setting a foot pedal. I should be able to look in the user manual's index under Foot Pedal/setting and find that information on page 81, turn to page 81 and see:
To set the keyboard's foot pedals:
1. Press the Function Button, located on the lower ride side of the LCD display. This opens the function page.
2. Select Pedals from the menu by pressing the "I" button on the lower, right side of the display. (This opens the foot pedal setting page.)
3. Select the desire function(s) of each pedal from the menu.
4. After selecting the pedal functions, press button #6 (Save).
5. When the save window opens, using the numbered buttoms at the bottom of the display, provide a name for these settings, then press the bottom of the #8 (OK) button to finalize the save function.
How difficult was that to understand? The option you offer, Diki is to look in the online features list, which says "You can save the pedal function." Wonderful! Now, all you need is an hour to find the correct buttons and pages to select from in order to perform that task.
Yes, there are lots of resources on the Internet, including this forum, that can provide you with that information. Of course, that's if you know where and how to search for that specific information. Not everyone does. Not everyone has your level of expertise when it comes to searching the Internet for a specific topic, and many have little or no technical expertise at all. When I was a young, aspiring journalist, which was longer ago than I would like to believe, an internationally known outdoor writer, Lefty Kreh, said to me "In order to communicate with people you need to use the least amount of words with the least amount of syllables to get the point across." He was right on the money! Lefty has authored more books than any outdoor writer in the world, his books have been published in several languages, and every one of them is a how-to, where-to instruction manual that is easy to read. If the arranger keyboard manufacturers only followed his lead I suspect their sales would far exceed their current level.
I think we are both pretty much saying the same thing, but we tend to communicate somewhat differently.
Gary