The fact that one job is more desirable than the other doesn't mean that the most desirable job is less stressful. Presidents desire their job and plan for it for years, but their stress level is usually something that very few people can even understand.
Then all jobs have stress. Name a single job that doesn’t. But if Tim gets sick he knows he’ll get the best treatment available on the planet with effectively zero cost. If anyone else gets sick they risk being made bankrupt for life and their family being homeless and/or starving.
If you honestly think Tim has as much stress as a poor person you have lived a life of privilege you should be more grateful for.