So we all know that when using harvesting tools, if you try and harvest something above the level, you get a ruined/unusable scrap of whatever, logs, fiber, etc. With this in mind, I think that when harvesting materials so much lower than your tool level that it shouldn’t consume a use of the tool.
For example harvesting copper ore with an orichalcum pick uses up as many uses as it does harvesting orichalcum ore. If you can’t harvest materials above the level of your tool, there should be some benefit to having a higher level tool, especially if the requirement for using orichalcum tools is being level 60 in the first place.