Not at all, in fact what depth of a score is “good” is fairly hotly contested. I like scores that barely kiss - but I don’t sand a lot. If you intend to sand then you’ll want a deeper one. You won’t know what your perfect setting is until you run tests (if you run them off the edge of a piece of wood you can see how deeply it scores), but as a place to start - 50% won’t cut through 
There’s a fabulous test strip you can use on any material where you want to get down to the best setting for you.
For example for Basswood plywood the Draft score setting is 300/30, and the HD score is 125/10 - I have a manual setting of 300/21 (comparing/contrasting the PG settings is useful as a starting point as well - if there is one that matches your material)