I would agree with you for the most part. The thing is, we have to keep a certain positivity when we are talking mental health, with which the chronic negativity that lies within us is hard to fight against.
I agree the words in that form, "it gets better", I hate and it's not realistic for so many. But where does it leave people if we say, "it doesn't get better"? We can be honest, but the situation is different for everyone, the little details. Better would be to encourage that "it can get better" if we look at things in a different way, approach things differently - again different for each of us.
We have to have some positivity, even if so many don't understand that their words or actions might not be helping in the way they think (if they think...).
Do not listen to a word I say
Just listen to what I can keep silent
The only way to gain approval
Is by exploiting the very thing that cheapens me