These would be valid points but for the glaring omission.
Seat belts, chainsaw safety gear, drink driving, smoking ban... All of these comparisons have been made but none of them are really appropriate or relevant to the face covering discussion.
Example: The seat belt law - it is the responsibility of the driver to ensure every passenger in a car is suitably belted (unless medically exempt)
For the comparison between seat belts and face coverings to be valid it would have to be like, the driver has to wear a seatbelt but the passenger doesn't if they are getting out in a minute, on their way to work, eating a sandwich or having a pint. Clearly, totally ?ing bonkers and would rightly draw derision for the inability to enforce and police it and the obvious illogical nature of the "guidance."
Same with chainsaw PPE, same with drink driving etc etc....
The issue with the "guidance" for face coverings is that it is too late, too random, ineffective and not supported by factual data. It is a question of credibility and on this matter the government has none - in my estimation.
As for giving confidence to those that may have been shielding - I'd suggest it would be much more efficient and effective if those that feel vulnerable take proper measures to protect themselves rather than seeking to impose improper measures on everyone else. I know that might be seen as more of a self centred position (and it is) but it is also a much more logical position IMHO. Better to properly protect the vulnerable than to improperly fail to protect everyone.
I still maintain that this has nothing to do with personal discomfort, inconvenience or awkwardness (well, maybe a bit of awkwardness) but it is entirely an issue of the lack of credibility to support the requirement.
The net result of this poorly conceived, delayed implementation will be that morons rely upon bad advice to implement unnecessary measures in an inappropriate manner such that risk will likely be increased through bad practice in relation to face coverings and an increasing apathy towards other, better, countermeasures such as hand washing and distancing.
Think about it - what's next? All the lemmings will be piling into airplanes and ?ing off to Marmaris to get sunburned and marinaded in Watney's Red Barrel - it'll all be OK though even though they are packed in like sardines they'll be perfectly 'safe' because they've been wearing gran's crusty nicks on their head for the past 3 weeks....