Is dealing with tox, trolls, etc, an expected challenge of the ranked climb?

I don't mean expected as in sanctioned, but expected as in "This is one of the challenges you must face beyond learning your champions, and you must learn how to deal with it?"

I wonder if this is why we see so many pro players that behave badly - if you're used to tox, perhaps even toxic yourself, then the toxic behavior of other people won't bother you as much, with that being one less mental challenge you need to work through to start climbing the ladder?

I plan on actually starting ranked once the season begins, and I'm trying to psych myself up for it.

Does "mute, report, and carry on" have just as much weight as "stay behind your minions when is in lane"?

Does "you will have trolls in your promos" have just as much weight as "going for baron when you don't have vision of the enemy team is a bad idea"?

Are these unwritten rules that anyone who wants to get to challenger needs to internalize?