Applying your reasoning, a few years ago you would have concluded that there are no planets other than the one in the solar system. Only recently we started to detect exoplanets.

There is a huge mistake in your reasoning. Since we don't know most of the drake equation parameters, assuming all of them to be 0 or near enough to 0 is an equal mistake as assuming them as 1 (or very near).

There are only 2 logical conclusions:

- using only known numbers: we don't know if extraterrestrial life exist.

- using plausible estimation based on what we know today: extraterrestrial life is very likely to exist.

There is no "no life" conclusion. Just, we don't know.

I wonder why inorganic chemistry is seen as "normal", and organic as "special".

No-one will argue if all the elements we find in the solar system can be found across the universe.

A lot of people argue that life, present in the solar system, cannot be found across the universe.

Nonsense to me.