@1515mnet You're being very selective in your cropping there 
You're right, there IS provision for exercise, and a walk IS exercise.
And you are allowed to meet one other person not from your household.
Not everyone has a best friend on their doorstep.
Not everyone has appropriate routes right from their front doors.
I'm also surprised that no one has pointed out that for women, walking in pairs, especially after dark (which is about 4.15pm here currently) is an important safety factor.
Newsflash - being outside is not risky Covid behaviour unless you are getting close to people while you are out. Do you honestly think that individuals or families out for a walk on their own are what is spreading the virus? Of course they aren't. The virus is being spread indoors in care homes, doctors' surgeries, hospitals, offices, public transport, schools and shops, where people are inside with other people and often minimal ventilation. Get a grip.
^^ This x100. I continue to be amazed that people don't really understand how the virus spreads. As one doctor said recently, ventilation is one of our biggest weapons right now, and guess what, outside is one hell of a big ventilated space!