My old kitchen sink had a strainer with a bad seal that led to a leak under the cabinet. The repair bill was way more than a decent strainer would have cost. That guide is right, those small gaps are just asking for a huge headache.

My cheap kettle couldn't hold a steady pour, which was a whole other problem (it made a mess).

Snapping clean off is the worst. I once had a whole bottle opener break in my hand mid-pull, left me just standing there holding a metal ring like an idiot.