I agree, if you are going to make something, do it right.

Well, adhesives are out there that should withstand the rigors of seawater and other such adverse environments, we glue airplanes thogether with them.

In relatively large concerns like Sinn or Omega, who are big enough the be able to hire an hour or three of a consultant's time to figure out what is the proper adhesive to use, any failures of the adhesive would probably be the result of economics, i.e. we're to cheap to use the right glue, or we're to cheap to ask someone what the best glue to use is.