I'm not asking for reasons. I'm asking: whom are you grateful to?
Thinking about it more, I suppose I'm also grateful for the individuals in this world who have had an incredible impact on this world. e.g. Jonas Salk, the guy who invented penecillin, etc.
I just really dislike people framing it as "practicing gratitude". I guess it comes from the childhood feelings of being thankful to one's parents for stuff, which is then generalized to "any feeling that resembles that feeling".
I can accept "consciously acknowledge positive things in your life" and I can see why it would be beneficial to one's mental health. Depression and anxiety are often caused/worsened by focusing on the negative aspects of life.
And not so much as grateful to but more like grateful for.