I see your point but what you present here is a typical characteristic of a broken game economy, which basically sould be the foundation of any good MMORPG. If everyone will have infinite gold and mounts, it will basically mean the game became just a PvP arena and its concept is dead. That's why devs should look into this very seriously from the beginning. Also, I think that "taming" should be very limited and not everyone should be able to act as a tamer (like in UO, where tamers were super cool but they were also very limited in any other activities because of skill cap).
TL;DR version of below is that I completely agree here ^
A big difference, and a positive in my view, is that there will only be one character slot in MO2,
there were those of us in MO that had our mains as dedicated tamers,
I didn't use any spare slots more than a few times over the years, it was an extremely enjoyable playstyle being a vagrant tamer in the Myrland of old plucking the best Jungle, Desert and Bull horses stealthily avoiding roamers, Risars and probably the most entertaining; DOOM, those guys were fun.
Once breeding came in to MO we were all pretty excited for a while, we thought there might be a benefit to being a 'master tamer' with beast mastery etc etc, but newp, there was no advantage to that in breeding whatsoever, so there soon became little point to being a dedicated tamer at that point, the advent of Molvas and Lykiators was fun but the price of mounts on the market was less than what donkeys used to sell for so it was no longer a way to survive and those with gold just pumped out the best stat mounts as needed.
I'm all for riders that aren't tamers being able to grab a donkey or basic rideable steppe horse to get around like it used to be but i'm really hoping the balance is struck right this time as there's a big potential to attract new players again in the non-pvp playstyles.
If there's ever breeding again, I really hope it gives a clear advantage to those with tamer/animal specialised characters.
In MO2 there's only one character slot, so if this works out and anyone needs some quality mounts down the track, you'll know where to find me