I've Noticed that myself as well as most people in my guild have quite a very large excess in Sim Tickets, Low-Level Ability Mats, Low Level Gear etc. Gear wise, this isn't a major problem for lowe...
Look at the fleet arena rewards. Both first and last place get 150 sim tickets.
They're not a currency. They're a retired mechanic, and abundance was much easier and less likely to cause cascading bugs than actually removing sim tickets from the game.