Linoleum and why it used in Tears?????

Linoleum - I wish I knew than what I know now when it comes to having linoleum on the floor of my teardrop, if I had it to do over again, I would NEVER have it on the floor!!! I see no reason for it except for 'LOOKS" but once you put the mattress in - question: who's looking at it???? so what's it propose?? Had my trailer built 4 years ago and have had off and on doors leaks and had always thought I had been ahead of the water wood damage in drying it up before anything happened. Well late last year, when removing the mattress I found floor bubbling and after more checking of it I found the plywood underneath was swelled up and separated =s water damage!!!! Pulled the linoleum back and also found that the builder had not glued and sealed it down, but had just used the "newer" and quicker way of installing it by just taping it down. I, after installing the linoleum in my own kitchen area of my house in 92 by gluing it down think this would have been a better- more water tight/sealed way of doing it (it's still doing great today!!) Well, today after finding more damage I ask? why is it even done this way and is it even needed?? My thinking now - NO linoleum, just leave it open for constant monitoring for moisture damage when removing the mattress. Also deciding that after any and "every" camping trip, remove the mattress for drying and airing out!! no matter how long in between trips!!!! Thank you for your time in reading this - just had to airy'ate some of my thoughts after getting so upset in finding what I found today!!!!!