"The way to ship good stuff is to ship lots of stuff and keep the good bits" - apologies to Linus Pauling

Or perhaps to build lots of stuff, and only ship the good bits.

If you don't ship it you don't know if it is good or bad.

You don't know for sure whether it's good. You may know for sure that it's bad.

Shipping it over to user testing will help.

Maybe more that if you ship bad stuff you don't get to keep shipping stuff, you have to stop and worry about keeping the bad stuff running.

Be happy by shipping stuff, and keep shipping stuff by shipping good stuff.