1) :D Let's go to Venus! \o/
2) Just because we don't know of a natural production method, doesn't mean there isn't one.
3) Life finds a way. We have microbes that live in boiling springs, so microbes on Venus are not implausible.
Note that Item 1 applies to both Item 2 and Item 3. We could discover life; we could learn more about how phosphene happens; it's all nifty.
My inner scientist is a mongoose: Run and find out!