If that’s what they wanted to do, they would have to realize those gains. The state is doing the opposite of preventing this.

Your question is more well formed if you challenge the premise that the tax you owe should scale linearly with the value of your assets. Obviously a business benefits from things the state provides, and the business should pay it's share to cover those costs. Maybe, honestly, even a little extra.

The challenge is if someone makes a software company, and a team of 20 workers on computers create a €10B business, does the state have a fair claim to €5B of it when the company at most with the most generous possible estimate (and then double it for good measure) used €50M of state services?

The premise of taxes?