It's just a matter of how you define "playable".
Take butterfly rubbers for example. Everyone knows Tenergy is the best (for now before dignics) in turns of the balance between spin, speed and control. But Bryce Highspeed is playable for some people, and Rozena is playable for many people.
But many people still choose Tenergy rather than Bryce Highspeed and Rozena.
Same with boosted Hurricane.
Boosted ones has better balance between spin, speed and control than unboosted or factory boosted ones.
You just need to find your most suitable set up. Some people prefers to boost 2-3 layer to maximize the spin and speed. Some people (like me) just boost 1 layer to get best balance. While some people just play it unboosted.
For me, boosting with 3 layers is “unplayable" as it is so fast. And unboosted is unplayable as it feels so hard. Playing with either of the these will make me make at lease 3-4 more mistakes in each set.
I think the most important thing about boosing H3 is you need to try different set up to find your most suitable ones.
From my point of view, if you just start playing H3, boosting 1 layer is the best to start with.