I love the place, even when it is so different this year! At it's best, the Lake is uniquely exquisite.
The mud does not bother me at all.
The water is fine because I don't ingest it.
I had no issues with medical things, but then again, I played in the dirt a lot when I was a Kid and swum it lots of farm dams!

I go there because it is really fun sailing with regular steady winds and flattish water. Plus there were many like minded windsurfers to hang out with.
I can also go faster there over a NM and 1 hr than at home, but probably very unlikely that I will ever get a 2sec, 10 sec, 5x10 sec PB there.
I would go there to sail even if I didn't have a GPS.
Why else would I have stayed there for about 6 weeks of the summer and loved ever minute?