"Yeah that's how things work you know? When you don't have any proof you don't start speculating, maybe we will know more about it in the future, maybe not.
You can debunk something even when you aren't 100% sure of its origin/cause/whatever, you just need to know if something it's plausible or not"
The argument can be made either way - until they are 100% sure it came from a natural source and was indeed a naturalistic phenomena. To write off the potential origins without all the facts is asinine. We're in an age where biochemical dangers are indeed a thing. Whether it's been genetically engineered or not, does not mean it did not come from a containment laboratory - does it? Perhaps it was extracted in a method from this lab that made it much easier for human infection - without the engineering? We can't definitively rule it out. But, you cannot deny the proximity of China's only top virology lab being around the corner from the epicenter of the disaster.
That said, there's been release that of the 41 original infections, a good portion of them did not originate in the seafood market... There's too many unknowns to defend the scapegoat opinion. All sides need to be looked at, in depth. I don't buy the coincidence factor, however. It's too close to be a coincidence. To say otherwise is naivety.
"Let's be honest, if we want to make up scifi theories we should aim a bit higher, I mean a virus that basically only affects old people, with mostly mild cases it's a rather disappointing biological weapon, I'm sure they can create something better."
Sci-fi? You're negating one of the key points... The origin of this virus is literally on the doorstep of their top virology institute... Coincidence? Perhaps. Likelihood? Nay.
"It only affects old people."
It's already killed over 2,500 (official claim), and continues with no end in sight. Infections increase. Italy is now the main doorstep to Europe.
I don't remember a similar fervor towards other coronaviruses - such as MERS and SARS - do you? This one is being taken WAY more seriously by both WHO and China. So, you say there's no worry?
The doctor who flagged it was 33-yrs-old. It doesn't just kill the elderly. In fact, many people who have died from it are in their 30s and 40s. Sure, elderly are far more susceptible - but A. we can't trust the numbers, and B. we have confirmation it kills of all ages. And if you have pre-existing issues affecting your lungs - such as smokers (obvious), diabetes, etc, or really suffer from any lung or heart-related issue, its way more likely the pneumonia it causes will be more severe.
On top of that, pneumonia leaves permanent lung damage.
That said, if you contract it once - even if you do recover - you carry the permanent damage it did to your respiratory tract. There's also nothing preventing it from reinfecting - given the infection rates are much higher. There are now cases to be made that it spreads through fecal matter - which is literally EVERYWHERE. It can survive on surfaces for weeks. The more they find out about this - the worse it is appearing to be.
If you get it once, survive, and get it again... What do you think your chances are the second time? No healthy person can forego repeated infections by this. And if you already suffer from other ailments, it's an even worse outcome.