Eating 3000 kcal every day would make me shrivel away to skin and bones.
"thing to do when trying to cut or bulk"
Most adult males who lift enough weights to care about cutting and bulking are burning 3000+ kcals daily.
I very much doubt that. Most adult males that combine lifting 1 hour+ a day with a physically demanding job and who is otherwise highly active, maybe. That includes a very small proportion of people who "lift enough weights to care about cutting and bulking".
I've done power lifting for ten years. I'm 108kg, carry around far more muscle than the average man. I exercise hard 3+ times a week. That's enough that my lifts according to strstd.com are all in the "advanced" range - much more than that is a waste when doing power lifting unless you're aiming to compete internationally. Yet my daily calorie need is on average ~2300kcal because I have a sedentary office job.
Most guys I see that worry about cutting and bulking have no clue what they're doing, and end up getting fat and bloated when bulking, so I tend to discount what people think they need quite heavily. I gained most of my muscle early on with a diet that saw me on 1600kcal-1800kcal. It's just the last few years I've been able to increase my intake above that without adding too much fat (and if you think I'm super defined and low body fat, think again)
Yet you are much larger, and fitter, but only need 2300 to maintain. I used to have more than 25% of your total daily intake in my coffees! And I've never been fat fat.
It would be daft to assume the same thing couldn't happen with people.