Hi Casey
I guess I could consider myself a "third generation bariatric". Grandma, Aunt, Mom, and Dad all had surgery before my wife and I did. My Grandma and Aunt had it back in the 90s (Aunt in her 20s, Grandma in her 50s). Mom had it in early-mid 2000s (40ish age), and Dad had surgery in 2010 (he had just turned 50). With Grandma, Mom, and Dad, they were so heavy for so long that between getting older and having been too heavy for too long and some damage being done, they still had issues with their joints or health. Grandma and Mom have both had knee replacements, despite remaining relatively healthy since their surgeries. Dad had triple bypass heart surgery last year. My Aunt has been relatively healthy. None of my relatives regret the surgery, but I can bet if I asked my parents or Grandma, they'd all probably wish they had their WLSs sooner.
I had surgery in 2017, three days before my 29th birthday. Doctors have told me that, despite my lifelong being obese (probably been "the fat kid" since 2nd grade), I haven't done any significant damage. Pre-op I was diagnosed with sleep apnea and a vitamin D deficiency (I live in upstate NY, everyone has a vitamin D deficiency!). And since my surgery, I've trained and completed two full marathons, and have more to come. I was training for a marathon this spring, but COVID-19 canceled that one, as well as another long distance race has been canceled. I feel like I have the rest of my life to do things I've never even dreamed of doing! When I wife and I were dating, she asked me if I had considered it (I was a 380 pound 22 year old) I took what I call a "typical man" position and told her "I'm young enough that I can lose the weight myself", which was true, but I couldn't maintain it, and I never got as light as I am now (230-240 neighborhood, with approx. 20% body fat).
Sorry for the long backstory, but I fully support having surgery in your 20s. Probably 95% of the people I've spoken to about surgery say their biggest regret is not having it sooner.
Good luck to you!
