If tiny chemicals can do that to you, because you ingested them, what about all of the other things you ingest, including sound, which cause chemicals in your brain to make reactions?
> [...] something as simple as deep and intense breathing for not more than 5 minutes can alter state of mind drastically.
?
Because it seems some people are voting as if you wrote "[...] the only thing that can [...].
I'd grant some exceptions such as a zen student receiving a lesson/koan that drastically changes their thought processes, but I'd argue that the change was already within them and the sound was just the catalyst - the same lesson/koan is unlikely to have similar effects on other people, and certainly not without the recipient having spent time studying that religion/philosophy.
One chemical change is caused by the brain working as designed, while the other is a deliberate attempt to change the brain directly.
If you say it is obvious that everything you ingest affects you, then what about time? Both of us are clearly ingesting time, it is simply another one of our inputs. And, of course, it is obvious that time affects our mind and body.
We are not ingesting time, we are in a certain sense creating it. We constantly observe the world and it changes over time but just observing the world alone is not enough to perceive time. You have to memorize the current state of the world as you just perceived it and later compare your new perceptions with the memory in order to determine that the world has changed in between.
Perhaps you are right, it is we who create time to observe.
In general it seems like attempting to live in human society without memory is a pretty traumatic experience. Or it would be, if you could remember experiencing it.
It's also very hard on the people around you.
Put another way: all things are not equal when you ingest them.