Recently asked a similar question myself but on a dedicated dog owning forum. Needless to say, got a lot of backlash.
There is a conflict here in my mind.
Lots of people own dogs, got to be millions of UK households. Are you telling me that all of those don't work full time hours or work close enough to pop home for lunch every day? Unlikely in my opinion.
So I think there will be a lot of dogs being left alone whilst people are at work. And I would also say that 30 years ago it was common then too but back then it was just considered normal.
So when someone like me or OP asks this question, the answers (not to get a dog) do not match with the reality of what most people (who aren't here on the forums) are doing, you just don't know about it normally.
Then the second issue for me is the dog owning enthusiasts view of the living environment of the dog. Many rescue centres seem to believe that you need not only to never leave the dog alone, but also have access to acres of rural woodland on your doorstep for multiple hours per day outside exercise. Because many of these dogs 'prefer a rural setting'.
Now Im sure all of us here would love to be working only 2 hours a day and live in 10 acres of our own 6ft fenced woodland. But that is not what 99.999% of us have. Those expectations are wholly unrealistic, it is no wonder many of these dogs never leave the rescue centres.
One person on the other forum used the term 'snowflakification' of dogs. I.e, in this modern day age we are wrapping them up in cotton wool too much compared to what we did in previous generations.
I dont know the answer myself yet. My girlfriend really wants a dog but it would have to be alone a couple of times per week most likely. It does at times feel like the moral expectations have become a bit too perfectionist, I don't know.