My experience with unlocked bootloader and warranty topic

So, here's what happened. Phone got somehow exposed to water, even though all the flaps were closed. Just a week before that, i got my bootloader unlocked just to get root. After the exposure, phone was not working at all, so even though i had bootloader unlocked, i sent it to the repair centre here in Slovakia. Told them that it's not booting up, paper under the flap turned soft orange after water exposure even thought it was closed. I requested the vacuum test or whatever the test is called. After a week, i got my phone back with brand new casing and motherboard. So, here's my idea. Flap was propably faulty. and the test proved that. Even having the bootloader unlocked didn't stopped them from changing all the things not charging a single Eur. It's just a tip, but, can't we just after bricking our phones, damage our flaps and get it damaged by water? There's pretty big chance that it will be accepted as flap fault. Hope this helps you somehow.