You’re wrong about that, look up videos of strongmen and bodybuilder meals/eating routines. The 2 hour workouts at the top of these fields are very calorie intensive.

Bodybuilders eat a lot in the offseason because they're on tons of drugs and trying to maximize the amount of lean mass they can put on, and they eat more in general because when you have 100lb+ more muscle than the average person you have a significantly higher base metabolic rate. You can go on a variety of PED related forums and find IFBB pro's posting food logs, etc., and see that these crazy eating routines are limited to certain parts of the year, and even then have been falling out of favor - the 'lean bulk' for pros is more popular than ever.

Very few IFBB pros are working out in 2 hour sessions, either. Coaches understand junk volume way better now and know that a lot of the work being done previously just wasn't providing much muscle growth stimulus after a certain point. Most are spending <8 hours in the gym each week in general.

The top of the bodybuilding field is not eating a ton of food because of their lifting routines burning a bunch of calories.

I have lifted for 30+ years and something very un-intuitive with powerlifting is the optimal weight class for a height is extremely high.

If you are 5'10" you are pound for pound stronger at 240 than at 198. 198 will be dominated by someone who is shorter otherwise.

You are also much stronger the more you weigh, period. Strongman are eating so much to keep their weight up, not because they are burning so many calories while working out.

Even the most intense prowler workout that will make an untrained person puke their guts out is easy to out eat.

It is easiest to see with a contest bodybuilding diet. Even a 250lb bodybuilder who is doing a ton of working out is basically eating nothing. The body is incredibly efficient at holding on to weight. If it wasn't, humans would have starved to death a long time ago.