What's missing from that other perspective is lumping every diet in with pure calorie-restriction diets. Calorie-restriction alone is notoriously hard to sustain long term. Honestly, I'd argue a diet where you change nothing except portion size might be the toughest kind to stick with of all.
At the same time, I think you might be underselling just how much this drug class shifts things hormonally. From where you're sitting, it's mainly helping you make smarter choices. Say hypothetically that combination gets you 50 pounds down before plateauing. If you then stopped entirely but kept the better habits, maybe you've built new patterns that prevent bingeing, you'd likely still regain some portion, perhaps 10 to 20 pounds, before leveling off again. Like your mindset here, but worth recognizing that what you're losing comes from both better habits this drug class enabled and its direct hormonal effect on weight itself.