I think the more important thing to look at here is the answer to this question: what is it that people so badly want moonstones for? Why do you feel you're at a disadvantage right now? @Ninetales
You bring up apparel and customisation, which is definitely something I think a lot of people do want moonstones for. This is partly a dress-up game for our wolves, it makes sense that folks would want to have access to related items that facilitate that aspect of the game. And personally, I think the purchasing of wolves and items on the Flea Market will eventually calm down soon enough that using moonstones and pebbles for that won't be a problem anymore.
Where there IS an actual disadvantage is the expansion cost for Mining and Cooking. Mining primarily feeds into Crafting, where players can either sustain themselves for apparel or use it to sell items on the Flea Market. So, as you progress further in Mining, you become more and more disadvantaged as your cart fills with uneven amounts of ore. I'm an all-day grinding kind of player, but I cannot imagine what it would be like for a casual player to send your wolf off to a higher mining area and coming back 1-2 hours (or the next day) and to find that you can't smelt anything, so you either remove enough ore to hopefully fill with an even amount that happens while you're playing, or you continue that over days until you do and can send your wolf back to smelt. This problem only gets worse the higher you go in Mining, because you'd obviously want the higher-tiered ores, but you'll be flooded with copper that you'll have to micromanage. This becomes less of an issue if you expand your cart of course, and that totals 175 moonstones (over $10 USD). The further you progress, the less annoying it'll be to outright unplayable for a casual player.
Cooking practically feeds into stamina, which you absolutely need to refill if you want to complete any set of activities within a shorter time of play. The fewer slots you have, the more often you have to keep returning to Cooking in order to keep playing the game. I'm sure a lot of casual players would like to 'set and forget' a good chunk of fish or meat, since there isn't a penalty for not micromanaging it, but over time that won't be possible the more wolves and levels in Cooking you get. I think it's possible to skirt by without upgrading Cooking for longer because the rate of it becomes quicker, but it's another 175 moonstone expense that's tied directly to gameplay.
I think there are a lot of ways that could solve the problem. The problem isn't however ‘I can’t afford to buy fancy wolves or fancy things', free-to-play players genuinely have a severe disadvantage vs pay-to-play ones. It's going to take weeks to months to gain access to the same game as those who can dump over $30 USD, and that is for people who grind and play all day, who have the time-resource to spend that players can pay to avoid with real-life currency. Casual players may never earn enough moonstones, and I'm sure at some point when they reach a high enough profession level, they'll hit the expansion wall and stop playing altogether.