It's carbon neutral if you don't consider time. But take wood which took 10-50 years or more to store up carbon, and then release it all at once... and now, while we're already releasing too much.
We can't grow it (absorb carbon) as fast as we can burn it (release it), so it's effectively NOT carbon neutral in our time.
Woody biomass covers more than trees. Corn stover, sugar cane bigasse, rice hulls and a load of other agricultural and waste plant materials that are produced annually, and can be gasified and burned cleanly to produce electricity and heat.
The core proposal isn't to replace all energy production from burning wood alone, but to explore all renewable energy sources at our disposal. Producing high value heat and energy when the sun doesn't shine through biomass gasification or anaerobic digestion helps us to fill in the gaps and utilize fuel sources that are just otherwise rotting and releasing methane in the atmosphere.
It is wise to look at all waste which each region has and seek ways to use it better. In the case of the Netherlands, I'm not sure how much of those opportunities there are beyond manure (which could perhaps be very big).
Is it the relative inefficiency and cabron generated throughout supply chain?