Sony A7 series moisture proof?

OK in the long tradition of venting your anger on the internet rather than your nearest and dearest, I just want to say this....

This advert for the Batis seriously irritates me....

https://www.youtube.com/watch?v=pp-nUqpwhTs

....because it 'explicitly' implies it is ok to use an A7x in the rain.

Now when this advert came out, I knew it wasnt true because the one occasion I very deliberately used my A7r in the rain, the shutter button failed due to 'oxidisation' and it cost me US$200 to be replaced.

15 months later on my A7ii, the on/off switch failed and it went back to Sony. This time because 'water' got into the main board it is going to cost US$950 to repair. Now, as you can imagine, I never used this A7ii in the rain (once bitten, twice shy) and can only imagine the 'damage' is caused by the fact that I live in a tropical climate and that condensation can occur by moving in between air conditioning and the tropics.

I can just about live with this although it is incredibly irritating. I remeber that Sony claimed at the very initial stages that their camera was weatherproof - but they quickly backtracked. But it is especially irritating to see Zeiss claiming weatherproofing of their lenses on an A7 that apparently cant even handle my air conditioning.