//Wearing a mask generally doesn’t harm you. So why not just do it where and when required.//
Your statement is not correct. The WHO published advice on the use of face coverings by the general public. One of their concerns was the risk of self-contamination by wearers who had not been properly trained and disciplined in their use (i.e. almost everybody). In many circumstances that risk outweighs the benefit to others that wearing a face covering or mask provides. I've posted links to that guidance on here more than once and am not going to hunt round for it again but it is not correct to say that wearing a mask generally doesn't harm you.
Yes, Sammy Wilson should have worn a face covering. But he is correct when he mentions the stasi-like atmosphere that is beginning to creep in here in the UK. Hitler began the brainwashing of the German people by encouraging them to report to the authorities anybody who was critical of the Third Reich. That attitude was clearly carried over to East Germany after the war. When all this nonsense ends your neighbours will still be your neighbours - the same people who you might like to borrow a cup of sugar from or water your greenhouse whilst you're away.
Also, it is clear that "mission creep" is now evident with many of the regulations. Face coverings began in shops, spread to public transport, Transport for London gold-plated it by passing a by-law insisting on coverings on their railway stations - even those in the open air; now you must wear one if you get up to go to the toilet in a pub or restaurant. How long before coverings are required as soon as you set foot outside your front door? Pubs and restaurants must now close at 10pm. How long before you cannot be on the streets after that time without a "reasonable excuse"?
It is time that the government's strategy and in particular its imposition of (often ridiculous) restrictions were brought back to Parliament. These are not trivial infringements on the population's liberties we are talking about. In parts of the UK (and no doubt everywhere soon) it is illegal to invite somebody into your house. It is illegal to "gather" in numbers more than six, meaning huge difficulties for even small families who may want a get-together involving children and grandchildren (unless, ridiculously, they line up outside the house and operate a "one in one out" system).
The implications of these restrictions are enormous and six months ago people would have gasped at the notion that such proposals were even being considered. Now "it's for the good of everybody" that a couple cannot invite all four of their parents to their house to celebrate one of their children's birthdays. Well it's not very good for them.