Statistically most will gain it back, so no.
"By some estimates, 80% of people who successfully lose at least 10% of their body weight will gradually regain it to end up as large or even larger than they were before they went on a diet."
https://www.webmd.com/diet/news/20161014/how-your-appetite-can-sabotage-weight-loss#1
It's not purely aesthetic for me. I am very active/athletic and eat healthily, and those things are important to me. Given that they are likely to gain it back, I would worry that they would get into habits that were incompatible with my lifestyle and I know it would be frustrating to me. I would have a very hard time being supportive of a spouse who brought junk food into the house, spent free time doing sedentary activities, and serving up huge portions. They would be unhappy (because I am judge-y about lifestyle habits), and I would be unhappy (because it would feel unsupportive of my health goals to be around habits that were not conducive to my diet and exercise efforts).