Not for me. I work out about 3 times a week, never felt like my appetite got smaller on workout days.
Intermittent fasting is nice however. There are pangs of hunger occasionally, but if I power through them, they go away after 1 hour usually.
I know, for instance, Penn Teller lost his weight in the same way - he decided to just eat baked/boiled potatoes with nothing else and just chilled out for a 100 days and lost 100 lbs. That's what worked for him!
https://www.goodhousekeeping.com/health/diet-nutrition/news/...
This was one of the big surprises for me. When I'm exercising regularly, food tastes better, and yet I'm satisfied with less of it.
I practice intermittent fasting a lot and I cannot say that it affects my mood negatively. But I was very grumpy when I ate "five small meals a day".
It seems that the digestive system is more OK with being totally empty than being just half full all the time.
Please be careful generalizing anectodal facts. Lots of people, me included, have otherwise experience.
Post exercise I will often have a sort of hunger roller coaster. Naively, imagining the body's metabolism, hunger is responding to perception of a calorie deficit in the blood : organs demanding energy and blood sugar decreasing, forcing burning of calories from stored reserves.
But what if your body is able to efficiently maintain glucose levels? in that case exercise might not induce hunger, in fact it might be that exercise stimulates alternative pathways that release energy and these stay active even after you finish exercising. This might well be much more the case for well trained athletes than regular people. Or it might depend on diet or loads of other factors.
Personally, I have found that exercise is nearly pointless any time other than right before I eat. So exercising before breakfast is perfect because the stimulated hunger response is immediately satisfied by eating breakfast. But I don't eat more breakfast than I usually would, so it's a win.
It raises the blood sugar levels as the body supplies the muscles with carbohydrates, and triggers a complementary response in appetite hormones.
Finally, and most importantly:
Exercise releases dopamine.
Dieting is universally a mood killer, because kilo-joule deficit equals starvation.
So whilst it does not directly impact weight loss. It still makes it (a bit) easier.
Plus there are an enormous quantity of other factors in health that are impacted by exercise.
Bodily strength is entirely responsible, for example, for stopping you getting a "bad back."
The less strength you have in your back muscles, the more strain your vertebra and ligaments are under. Hence your body falls apart quickly and more easily.
You definitely need both kilo-joule control and strengthening exercise if you want to keep your life on track.