Nothing you need in the game is required by astral shards. You can play the game beat quests and never use astral shards. In that sense, plat is far more important. You need plat to buy components, guild slots, heal and recon scrolls. I earn and spend plat far in excess of 200k a month. I am fairly sure I can do all my quests without a single shard.
So why care so much about shards, the daily roll and what not. Just play and have fun.