That’s because you don’t know better toasts. That dial controls just one parameter and in my experience they suck at consistency between a warm batch and cold batch.
Seems like a skill issue on your part.
Here's a very consistent toaster from the 60s where the dial sets how dark you want the toast, instead of how long to toast: https://www.youtube.com/watch?v=1OfxlSG6q5Y
My toaster has a little dial on the side that lets me do that already. I don't need to have a conversation with my toaster to get it to toast the bread, I just put the bread in it, push the lever down, and then toast happens.
Works just fine.