I think you are bringing fear of gold farming from some other game and a long time ago.
Once again, why somebody would hire a gold farmer? There is nothing you can do with the credits anyway. If your goal in game is to, say, have an Anaconda or Federal Corvette, you're basically done within a month or two.
I notice you decided to attack my assumption(s), rather than simply follow my advice of trying to prove to FDev that player-to-player trading is actually very important to many people. That suggest to me you don't think you can prove that...
I've been playing ED since premium beta (*), and still don't have nearly enough to afford an Anaconda. Most likely because I lost any interest in grinding, and the most fun/interesting stuff in ED rarely makes you any money, and I don't have huge amounts of time for gaming anyway. (* = but not very often since the middle of last year, excepting a longish stint in PowerPlay, which earns you almost nothing unless you are Rank 1 or maybe 2, and surface missions in Horizons, which earn you almost nothing.)
Which is merely a long way of saying, don't assume that your own gaming/ED experiences apply to everyone. Even if they apply to 90% of players, 10% is still a LOT of players.
Well yes, you can have somebody else get you there. Or get you enough credits for all the ships with A class upgrades. Brilliant. And what next? There is still nothing more you can do with the credits. Even if you have all the ships with all the best modules and each ship in several specialised versions, you can't do anything else with the credits and you can't fly them all at once.
I'm a bit baffled by your claims. I would say that (unlike most other MMOs) money is your primary measure of progress in ED. Many players set themselves the goal of affording an Anaconda, and grind like crazy until they can afford it, and then, having "won the game" (in their eyes), find they have nothing much else to do & so stop playing (and possibly moan on the forums that there's nothing to do, and perhaps that FDev should introduce new mechanics like, say, player-to-player trading).
More, if I decide I don't have the time to play the game myself and want to get into playing it when I have all the best equipment, I can always give someone access to my account
I am afraid that is against the terms & conditions (EULA) that you agreed to, specifically the "under your custody and control" part:
https://www.frontierstore.net/ed-eula/
, check their progress once in a while and issue payments via Paypal or whatever form I decide suits me best. And again, FD can do nothing about it.
Ummmm, FDev would be well within their rights to terminate your account.
Whereas the players having possibility to cooperate and trade between themselves can be a significant game changer when it comes to the multiplayer aspect of the game. This is the easiest way of creating content for ED without FD getting overly involved in the process and without creating any financial burden whatsoever for Frontier. It's not as costly and difficult to implement as you think.
I'm not the one you have to convince

however I suspect that your vision for ED is vastly different from both the game FDev pitched to Kickstarter, and their current vision. If you really want a player-controlled sandbox (or a first-person Eve Online), then sadly I think you will need to go elsewhere.
You say they would have to check if there is no gold farming happening in ED. I say even if there was, it would not be an issue for anyone.
I can imagine many possible problems from gold farming. It would cause a huge amount of server load (and so costs), which FDev won't want. It's also likely to degrade Online player experiences, since they're likely to run into gold-farming bots, rather than real players (unlike other MMOs ED has very limited player numbers per instance). And perhaps worst of all, it would threaten to unbalance the BGS, since automated bots will have far more effect than almost any real players (and if you have a swarm of them all doing the same thing in the same place...).
NOTE: It seems that we have such fundamentally different views, that I don't expect to reply further to you on this topic...