Why should it be be made easier to get? For players with gil, you can buy the geodes. If you don't have the gil just farm them on fire day. Sure you won't get 60 geodes in one fire day, but you still have the option to build it for free it's just going to take longer. Honestly 3-4m isnt so bad considering the stats on it. People pay 7m for +1 STR for Vulcan Pearl over Flame Pearl so 3-4m for more base DMG, higher attack and more STR on a weapon is hardly a big deal, most of the STR weapons have pretty good lasting potential for offhand purposes. Just buy all the geodes you can, drop 3-4m on the 65 geodes, eventually if you play long enough you'll make those geodes up once you complete your weapon, from exping/events where geodes drop. If you complete your weapon now and dropped 3.5m in geodes on it, I'm sure 60ish flame geodes will drop in your inventory within the next year just from doing Abyssea/EXP/random killings/Events in which case you can sell those and break even in time.
The expense of flame geodes and the rareness of fire weather are commensurate with the usefulness of STR weapons and STR rings/earring in my opinion.
As a closing remark I will say this though. Wait until the new expansion is released. Since there are reportedly 8 regional leader NMs or something of the sort in Adoulin, I bet the regions are divided up into ecosystems. If you look at the picture of Adoulin:
There could very well be a Fire Region(Volcano) an Ice area(Cave or Mountain) Water Region(rainforest) etc.. These regions could have a very high chance of weather for their respective elements. So just wait and see.