I know cases where too much focus on tests might be reason for a startup failure. Eg. instead of trying to find the product-market fit, resources are spent buil

I know cases where too much focus on tests might be reason for a startup failure. Eg. instead of trying to find the product-market fit, resources are spent building tests, and then funding runs out. Of course it is very difficult to argue whether test writing was the issue or something else, and people have different incentives related to that.