I agree with OP's sentiment but I disagree with OP's reasoning.
Gold consumables are generally a waste of gold, compared to other purchases that can be made. I take serious issue with gold-only consumables as they provide straight-up advantages over silver consumables and can only be obtained for free in extremely limited quantities, or you pay real money to purchase them.
Having no way to regularly and consistently obtain them for credits annoys me because they are a further way to optimize your plane, except they're locked behind a paywall or extremely inconsistent methods. You can only earn 3 of a premium consumable in a weekly supply crate, tops, ordnance has a slight chance of 5. It's extraordinarily rare to earn more than 1000 gold which only gives you 8 battles of full premium consumables. What's worse is that some of them can provide a massive competitive edge which you just can't get unless you run said premium consumables, and again, paywall/inconsistent method to obtain these competitive consumables.
Before the whole "just outplay the guy using premium consumables" argument is thrown at me. Yes, you can win against people using premium consumables without even using consumables. But you can also win against a specialized Vampire in your stock Typhoon if the skill difference is large enough. This does not discard the fact that there is an imbalance of power between the two.
As anecdotal experience, I only run silver consumables myself but have been in situations where the lack of the faster recharge time has cost me the game. I have also experimented with using full sets of premium consumables or using specific premium consumables; I tend to see my performances improve. I also have a friend who pretty much always uses premium engine cooling due to the 30s faster recharge allowing him to make riskier plays more often.
So, in conclusion: it would be good if gold-only consumables were changed to be purchasable using gold or credits. The advantages they provide aren't always game-changing, but the current methods of obtaining them are less than ideal if people want to perform at their absolute best. Particularly so because gold has so many better options and thus has a tendency to make purchasing premium consumables unappealing.