There may be a lot of antibiotics present in the soil which haven't been exploited yet because it's hard to grow in the lab the organisms which produce them. However techniques are being developed to circumvent this problem and here's an early discovery:

https://en.wikipedia.org/wiki/Teixobactin

Hopefully other and fundamentally newer ways to fight infection will be found. In the mean time getting fit and healthy now seems like a slightly wiser choice than it already was.