Yes it's straw-man 101.

Posit a radical view that no one is actually saying: It was engineered in a lab then deliberately released to infect the world.

Then structure your argument to counter this.

That's why i'm curious to look into it.

To say 'Let's take a look at the possibility it may have accidentally escaped from a lab in Wuhan that was working on coronaviruses' - that's not some wild conspiracy theory - it's a reasonable line of enquiry - so what's motivating the over-the-top reaction against it?