If the belief/theory/"fact" that all life evolved from a single-cell organism has no practical use,
I think the most practical use is watching you get your panties in a bunch about something that you imagine is true.
can you tell me why so many people spend so much of their time and effort studying it, why so much emphasis is placed on it, why it is dogmatically rammed down the throat of anyone who wants to study science?
I think you are mistaken about what they are studying. It is just your delusion that evolutionary theory is dogmatically forced on anyone.
The study of
biology is the study of
evolution.
Since ToE is useless, by not believing in it I am missing out on exactly nothing.
OK, then, but I have to wonder why you bother putting so much effort ranting about something you consider useless.
If space-cadet biology interests you, fine, but please stop claiming it's factual.
I don't know what "space-cadet biology" is, but assume you meant it to be insulting of anyone who has interests different than yours.
I much prefer real biology.
Well, one of the facts of real biology is that ignorance can be corrected by education, but stupidity can only be corrected by natural selection.
What if Eleanor Roosevelt had wings? -- Monty Python
One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie
If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy