At some point you get an internal timer
I had a low-level "chef" tell me that years ago when discussing dinner rolls and the timer on the oven said rolls were cooked in.
'Chef' Kiko is now doing construction or retail work and 30 years later I am still not burning anything because I use a timer.
I get that some can stand in front of the oven and wait for their project to get done. But I've got the day's protein, starch and veg to get cooked, plus the day's second special to get done and I've got one helper for all that. And, I've got tomorrow' soup to prep, and sometimes dessert to get done. And tonight's app; that ain't gonna prep itself.
So yeah, I need a reminder that something's in the oven or on high on the stove. Or worse, I need to remember when to clock out and back in for my corporate break.
I watched my lunch cook today scraping the burned bread off a grilled pastrami sandi because she had no timer, either internal or external. Either you know enough to stand there and watch it, or you set a timer. Or, as a shoemaker, you get burnt shite.
Internal timer forsooth.