I perhaps have an advantage here because I have passed training, an official government licence and 20 years experience in working with animals in a laboratory setting.1) Not for anything other than sample work. I especially wouldn't use them for some stuff in even labs
2) Unless the bat is literally unconscious and you know they're 100% free of any transmissible disease, No it's not.
The short answer is that it's far more flexible than that; lab animals may have diseases and workers just suck up the risk that they might contact something through bites, contact with urine/faeces, inhalation, etc. The protection needed relates to the risk, and the task that the worker need to do (e.g. you can't do a surgery in thick gloves). Lab animals are also often kept having had a load of dangerous diseases eradicated from the population, which may also be the case in that bat.
The RNA sequence of SARS-CoV-2 is easily accessible (hey, and we've all got our own samples of it now) and analysis is not consistent with it being man-made, or that sufficient changes between the closest bat and human variants could be explained by direct bat-human transmission.3) Not really. That's the working theory but it's not entirely known and may not ever be truly known. That's also based on the information the CCP provided about the Wuhan lab and it's work so how much do you believe the CCP?
I think Nick Calandra said he didn't want more conspiracy theories on this forum. I'm guessing that includes ones against China.
No. If you have a airborne virus that is infectious because it binds onto proteins on cells of the lining of the lungs, dumping into directly into the bloodstream may in fact make it useless, because it will not reach the correct target cells to replicate.4) If it's transmissible by simple droplet expulsion then an exposed wound would be a lovely opportunity for an infection