Why would someone chose a concept of useless event rewards?

[Aerowaffle]

I rather provide feedback and try to find solution benefitable for the most people (these, who dont want to do it more times dont have to, these, who want more rewards, can do it till end) than using empty phrases like "dont like it, dont do it."
I do every event, because I like them, I am just saying that better rewards from the "usable" stuff would make the event more repeat-worthy. Thats all.

If you provide valuable stuff in the seasonal events, you would change the motivation for doing them. People would be doing the seasonal events not because they want to, but because they feel like they would *need* to in order to take advantage of a limited time bonus in productivity. It would also cause dissatisfaction for people who were originally supplying the market for the items that the seasonal event gives out before everyone could get them.

Keep the items received from seasonal events exclusive, non-trade-able, and something that wont give your character the advantage. Although I agree that the current Easter event doesn't really have anything worth getting, but that's because none of the stuff looks good, not because we should be getting free materia. Keep it to things like bardings, minions, glamour gear, and furnishings.