I was diagnosed at age 34 with MVR and was told the same. It was mild at the time. I would go every two years for a check up. Knowing the symptoms I made sure I made the best lifestyle choices to lessen the symptoms and feel good. I trust my cardiologist whom I still see so when he told me the same thing I trusted his expertise and got on with life. At age 57 I had my first Afib episode so started seeing my cardiologist more often. Every 3-4 months staying on top whatever tests were necessary. The Afib continued so I had an ablation in 5/2023. Best choice I made. I’m now 65 and have just went to moderate on my MVR a few years ago. I still feel good and continue to get the necessary tests to be sure we catch it early if I get in the severe range. I workout but I stay away from certain exercises that put too much strain on a person with MVR. If you are still unsure how you feel about it, get a second opinion. Best wishes to you on this journey.