Who Are You To Say What's Right?

 This is probably too snarky, but bear with me:

If I fill my fuel tank with non-fuel or the wrong fuel, it will damage my car and fail to perform.

Is that because fueling the car is a bad idea?

• If fueling a car is a good idea, shouldn't there be a million ways to do it so that it's easy for people? This "petrol only" rule = is too restrictive to be useful in the real world.
• Every time I put diesel in my petrol vehicle, the mechanic pulling my gas tank and cleaning the fuel lines tells me I'm doing it wrong. Don't they realize there's more than one way? Just because my way consistently fails doesn't make me wrong!
• Why should all of those elite gate-keepers put down people who choose their own fuels? Why are they so petty and close-minded?
• Don't you think that people should get to choose to put whatever they like in the gas tank? This top-down mandate by car makers is undemocratic! It's authoritarian! Where is the psychological safety?
• Who are you to tell me what fuel to use? You're no better than I am, just because you're lucky enough to afford a car that runs every day!
• My cousin put petrol in the petrol tank and got a flat tire on the same day. Your petrol causes flat tires! What do you say to that!?

Look, it doesn't matter what we're talking about here: If you do it poorly, you will probably fail.

The correlation is quite high.

Is it possible that you could do it correctly and still have issues? 

It is more likely that your issues are not related to the thing you did RIGHT, but to the things still not done well.

If you are going to change the spark plugs, don't claim the freedom to put the plug cables back in any order that you find aesthetically pleasing. Your car won't work if you do. There is a right way and a wrong way.

If you are making a cake, you might want to use baking ingredients and not gardening supplies. You might have some latitude in technique and proportion, but if you mix dirt and fertilizer and put it out in the sun, what you're doing is not baking a cake. That's gardening. You can't expect to serve it with ice cream at your child's birthday party to the acclaim of the assembled children.

Why is it that some people have done TDD for decades and it has always worked for them, and your first attempt for a couple of afternoons in 2021 didn't turn out?

Is it because TDD doesn't work, and they're all a bunch of liars, or because your attempt was inexpert and maybe didn't employ the same strategies and approaches that they would have?