Wow man, thats a bum rap.
If you need to be mobile, don't get them both done at the same time. The risk of something bad happening during surgery is going to be just the same if you go twice, or get them both done at once. Two different areas being operated on, and they won't do both at once.
I'm 20 years old and have had 4 surgeries on my left knee. I destroyed it in a hockey game. I have artificial meniscus and fake ligaments.
The only downside I can think of for getting them at staggered times is having to wait longer to start physical therapy, because there is a certain time they have to heal before you can start. Maybe you can just do PT on one knee while the other is healing? It would limit what exercises you could do, but PT is always something to ask your doc about before undertaking surgery.
I've got about 95% mobility and no pain and I can run just as well as I used to, good doctors help a lot.
Don't skate anymore though
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Good luck man, let us know.