I don't think even FD themselves would argue that there is a problem with earning rates. Their solution might not be as simple as to buff Exploring, Combat and Mining up to near-trading levels, but I bet something is in the works. It is, after all, a videogame in 2015 that is being advertised heavily as showing off the combat aspects. I get that there are traders who enjoy the trading, more power to you, but it simply cannot remain in it's current state and be good for the game.
I also understand the argument of ''If a cobra can do all the combat sites, why would you need anything bigger? Be happy with what you have.'' The problem with that argument is you are showing understanding of the problem, but are then trying to tell others that they should be happy with the content they have, or that their dreams for the more luxurious ships are stupid because they don't want to space-haul like you do. You can repeat it as a mantra as much as you want, that ED is trading-focused, but it just isn't true, no matter how many times you say it.
Aiming for the biggest ship and having the fattest wallet are not necessarily the 'end game' of Elite: Dangerous, but the idea that just because it isn't means people should not be able to attain it the way they want to, IF they want to, is just smalled-minded and selfish. ''There is nothing wrong with the way I play, you should play my way too or just leave.''
Well, no. I shouldn't. I paid the same, real-life entry fee that you did. I should be entitled to play the game my way as you are yours. I should not feel penalized or forgotten about.
Speaking of which, the whole ''In real life it isn't X, so why should it be X in game?'' is the silliest argument. Elite Dangerous is not real. You are not really a spaceship pilot. None of these assets effect your real life. That doesn't mean they are meaningless, they are clearly important to all of us, but the comparison is just not apt.
In real life I can get up out of my chair and get some food, use the toilet and then take my Motorcycle 300 miles up country to visit family. In Elite Dangerous I cannot even get out of my cockpit. I can't walk around my hanger. I also cannot have a family, I don't have to pay bills.
Mimicking real life is not something Elite Dangerous does, nor should it ever attempt to. It is a beautiful, well-made and mechanically fun game to play but it is only exactly that. A videogame.
Two more minor, final points I want to address;
1 - Elite Dangerous, while being quite complicated, is not a simulator nor does it have simulation-level gameplay interaction. Check out this video of the mere startup sequence for an A-10c in DCS World and tell me starting up your Type-9, Viper or anything else in the game is anywhere near THIS level of interactive;
https://www.youtube.com/watch?v=-WyYA0pjUKw
2 - The idea that Trading should be more profitable just because there is piracy is also a biased idea. So you're saying Trading should be more profitable because you get shot at sometimes? It is possible to make that trading run without ever being shot at or interdicted. It is NOT possible to make money in any combat scenario without risking all the money you have invested in your ship. Not just your goods, ALL of it.
Allant's Final Thought and personal wish: With Wings implemented in 1.2, I think interdiction rates for trading-class ships should be increased. After all, pirates are more likely to scan an unarmed Type-9 and target it than my heavily armed Asp. However, FD should also introduce the ability to hire players for your Wing to protect you. Money up front, or % of profit of cargo on safe sales. That way even if the numbers don't get balanced elsewhere, traders have to share in their vast wealth.
Now you could say ''I earned that money trading, why should I have to share it?'' and my answer would simply be ''because in this instance, the galaxy just got a LOT more dangerous. You have to share because you NEED me. Without me, you make nothing anymore.'' Once traders see just how dangerous the galaxy can be, they'll soon be happy to share half their wealth to make anything at all
