In what world does "quality" factor into "convenience"?

This one, in this world many things that lose quality lose convenience, for example insulin - if you decrease the quality of insulin you will be decreasing the convenience.

basically in any situation when you decrease the quality of anything to such an extent that you use it less and thus get less of the benefits that it gives you it would follow that it would be more convenient that the quality was higher.

For example - condoms, condoms that don't work very well would be inconvenient.

But also coffee, when coffee is of such poor quality that people do not drink it that is inconvenient if you are employed turning coffee into code as the funny t-shirts have it. Hence my humorous reference to productivity enhancing stimulants.