To say most skills are unworthy in runescape is only a legitimate statement if you expect there to RuneScape gold never be any updates to Runescape ever again. By way of example, let's say RS adds a new ore that needs 95 mining to collect, and it's 10x more precious than a runite ore. If you only had 85 mining because runite ore rather than leveled past it, you'd have to spend a loooong time to have that 95 mining necessity to mine the new ore, provided that in fact, the costs of the new ore will have spiked considerably by the time you reach 95 mining. So yes, it is helpful to train past the tier of gatherables/craftables.
You twisting the points of everyone around and are beating round the bush. Like how you mention items being high because that's how it's, crashing. This was my point, and also the fact I never mentioned smithing. They included amethyst and the thing happened how I said. Players with 92 mining created a killing and gamers that didn't possess it didn't market it at that time that they obtained 92 mining to get its peak price. Because the precise situation happened in game so you is immaterial. You bring up alchmate when 75% of the osrs players utilize it.
That was exactly my point about large alching, you'll never find an item with great margins which lasts for over 24 hrs since players will constantly buy out the distribution until the rates are no more profitable, because large alching pushes the market for items which would usually be useless and prevents them from bottoming out just like a dead stock would in real life. High alching provides an artificial demand to seemingly useless things thus keeping old buy RS gold content related and making the rs economy as a whole a lot diverse and different compared to other mmos, where most mmos are gear treadmills where things will gradually become worthless and totally irrelevant in time due to power creep along with the industry inflation which follows.