Zetas may not be a problem for someone who started playing consistently 6+ years ago, but for newer or returning players, 6 zeta mats from weekly challenges and 1 whole zeta for a month's worth of fleet arena isn't feasible to catch up and be competitive. You're lucky to get 3-4 whole zetas per month.
Zeta catch up mechanics are needed, like a Lightspeed Zeta bundle. If you're swimming in zetas, then you don't need to buy it. However, it allows newer/returning players to reasonably catch up with the added benefit of pumping more money into the game :smile:
If people want to spend on zetas to grow their accounts, I say let them. Omicrons are and should be the real crunch, for now. Not older mats like zetas/omegas.