A concrete counterexample: plantura.garden is a large, reputable German-language gardening magazine / brand, and probably exactly the kind of legitimate site one would expect on .garden.
So while the abuse numbers may well justify treating newly registered / low-reputation .garden domains with suspicion, blanket-blocking the entire TLD seems like it would create real collateral damage.
So while the abuse numbers may well justify treating newly registered / low-reputation .garden domains with suspicion, blanket-blocking the entire TLD seems like it would create real collateral damage.