A legal dispute with your general contractor can just get expensive, and when you find yourself having paid 300 euros for the first letter from your lawyer, who tells you that continuing will cost 4000 euros, an expert opinion 5000, and if you lose the other side also gets something, well then you sadly think five times about whether you want to fight over 15,000 euros .....
With legal protection insurance, it doesn't matter to you at all and you can get your rights ...
And who, please, knows in advance that they will get bad craftsmen? Everyone takes them with good conscience ....
I would have taken out insurance immediately after one instance of botched construction work (-; or just ask the robber ...