@0xabad1dea This confuses cause and effect. "The poor craftsperson blames their tools" means they don't admit their own incompetence. They would be an equally bad craftsperson even with good tools; that's what the proverb is saying - the tools are not the problem.

That a good craftsperson doesn't tolerate bad tools is a different thing. The good craftsperson will not do a bad job then blame the tool - the good craftsperson will not use the bad tool. But whether forced to use bad tools or not, the good craftsperson will take responsibility for the work. And may even be able to compensate with skill for the deficiencies of the tools.

So the saying is not nonsense at all, let alone "complete nonsense".