If you're concerned about a 2 year waterproof guarantee not be accurate, you return the shoes when they let you down inside that 2 years.
If heard many stories of people doing that without hassle.
FWIW - my last four pairs of golf shoes have been Adidas models.
All came with 2 year w/proof guarantee.
All held up just fine when it got wet/dewy within that period.
The only reason I replaced any of them was because the soft spikes wore down to a point that i couldn't get a wrench on them to swap them out.
Pretty sure I got at least 18 months of weekly golf out of all of them too.
Currently wearing the AdiZero Tour shoe.
thanks C...grab your ball on Sunday...