For the vast majority of healthy individuals, passing an FAA medical exam is a straightforward process rather than a "difficult" hurdle. Over 95% of applicants receive their certificate on the day of the exam. The difficulty depends on the Class of Medical (First, Second, or Third) you are seeking. A Third Class medical for private pilots is the least stringent, focusing on basic vision (20/40), hearing, and general health. A First Class medical for airline pilots requires 20/20 vision and, for those over 40, an annual EKG. The "hardness" only increases if you have disqualifying conditions like certain heart pathologies, neurological issues, or unmanaged psychological conditions. However, the FAA offers Special Issuance waivers for many conditions that were once grounding, provided you can prove through additional testing that you can safely operate an aircraft.