When you know no better....

Then theres knowing you did something right that others couldn't figure out and simply kept breaking **** then calling it junk instead of mastering it. Expectations can also vary into dangerous for some... that's on them, not the part.

Dead horse named Chinese cheapo roller needle bearing rockers... story goes they eat through the shafts, loose bearings in the motor, tip pins slide out pop off a retainer dropping the valves and it all goes to bits...

Real story was the right shafts were needed, the adjusters changed from the type crane used that broke and bam.. you had a season/year out of it and threw them away.. or bushed them. But you paid another 120 or so and swapped the extras onto them and off you went new again. Of course the ratio was ? Just like the factory ,maybe better..lol..
Idk it really depends on what you're talking about.