If the powers that be truly fear that this will not behave like every other virus ever, then why?

1. They are incompetent and have not listened to people who have studied viral evolution 101, such as Mike Yeadon?
2. They have a vested interest in vaccine profits?
OR
3. They know that this is a bio-weapon but aren't letting on except indirectly by not expecting it to act like every other virus.

My money is on (2) ... but is this sound logic? Have I missed anything?

The whole problem is due to ignorance. Full stop.

Even if there are vested interests somewhere, or even if it is a bio-weapon, not all the perpetuators could possibly be in on the deal. It is their ignorant actions that have implemented the problem. They are the sine qua non.

If those that we elected to power had proper scrutiny of the science and the evidence, plus a modicum of capacity to reason, it could all stop. As it is, they are hampered by an over-riding concern for their own image and attempt to cover their errors.

The good old 'CYA'. Politicians who know nothing about science, and don't even know which scientists to consult!

The good old 'CYA'. Politicians who know nothing about science, and don't even know which scientists to consult!

'CYA': I had to look that one up! "Cover your ass".
Bearing in mind their verbal utterings, I get the idea of face-masks now.

2. Evolutionary theory for viruses says that each new virus mutates to become more spreadable but less potent in terms of damage to the host.

that assumes all viruses cause harm to the host;