They're a GCD.
If they're more potent than Aeolian Edge, then use them.
If they're not, then don't use them.

You're not forced to use them just because they disappear if you don't.
That's like saying you're forced to use Freecure when it procs...

You still have Shukuchi as the regular gap closer.
These are BONUS gap closers.
More gap closing = more melee uptime.

I'm not seeing the issue at all.