Kijanki, my recommendation is to work with tape for a while and then you will see that not only are my observations correct but also those of the NTA. (My statement was that tapes store in an attic much better than a basement, which is different from the argument you are making FWIW.)
A controlled environment is nice, the big deal being low humidity. For this reason I recommend that anyone storing tape consider the use of a pack of silica gel inside the plastic bag in which the reel of tape is stored. It might be hard to search on this but I have made this recommendation a number of times on this forum.