At first I was trying to figure out why the parent comment was getting downvoted, then I read the last line. Yeesh, ya, you don't need to "learn" to sharpen, just get one of those pull-throughs. They is a minuscule learning curve with with it. It doesn't do the best sharpening job but as a particularly YouTuber once said: "The best sharpener is the one you will use."

People don't want to do it and they don't want to learn to do it. It's easier for them to buy a new knife. They're not expensive. Maybe keep the old one for garage stuff and gardening.

I have one of these for travel: https://store.177milkstreet.com/products/suehiro-for-milk-st...

All you have to do is run the knife through it a few times for a decent sharpen. No power, no effort, no skill required.

A new knife might not be expensive, but it's a new thing that has to be produced, and packaged, and shipped, and stored, and so on. Just keep your old stuff in shape, people.