If the government had taken the advice and implemented it, fine. They didn't. They received the advice and appeared about to reject it. Thus they found the advisers believing they had to use something close to blackmail - threatening to leave.So what you are saying is, the scientific community used their expertise to develop a strategy which they then recommended to the government who implemented it. I didn’t say anything different.
You chose to introduce jelly and ice cream.
I understand an adviser who thinks their advice is being rejected might well feel they had no option but to resign. But the consequences of the government losing their advisers might not have played well for Johnson & Co.