"Taxation is entirely about raising money."
It isn't. Government has no need of it. Taxes are essentially shredded and deleted.
All very simple when you realise there isn't a fixed amount of money and it grows and shrinks as required by the economy.
What is spent and what is taxed are inductively connected, not directly connected. That's how we have 'deficits'. It's a function of the accounting.
"What does "releasing real resources" mean, and how does taxation achieve that?"
If you tax employment directly, private firms offer fewer jobs because there would be insufficient money in circulation to employ everybody (wages are insufficient to purchase output due to the tax take). The public sector then hires those who can no longer get jobs in the private sector.
The LVT fails to target the areas required, and it lacks a countercyclical behaviour. An employment tax, for example, collects more when the economy is hot and less when it is cooler. That's part of the automatic stabilisation mechanism.
"I'm puzzled as to how you conceive of government not needing land, when many government services do in fact need it"
Government is largely service based rather than goods based. What it needs is people.
Georgism is based upon a view of money that isn't actually the case. So it doesn't work.