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Why would I ever need an echo that has Havoc effects with a Spectro main stat?

I've been enjoying the hell out of WuWa coming from Genshin and HSR, so much so that I'm making sure to clear out my world's moonlit, void thunder, and sierra gale echoes so I have more to gamba gamba on. But when you get 3 cost echoes back-to-back like this it's just a feelsbadman moment. ._. I'm not petitioning to change the system or anything, just venting the frustration I suppose. Rng is rng. It is what it is. Back to echo grinding!