Just pay separate shipping and handling!

There’s always a catch 🎣.

NASA has been doing the sterilization I listed above for decades now; it’s not new.

Can you give some examples (preferably with references) of where NASA (or ESA, etc) have avoided areas due to fear of contamination?

That’s why this is done: https://www.nasa.gov/ames/space-biosciences/planetary-protection/

I realize you were probably talking about visiting other worlds in person, but we would probably still have unmanned missions there first.