Yes, I think that walking 10,000 steps a day is a bit of a myth for most. That's basically four and a half miles for many. Probably an hour and a half minimum. Two hours for some. Who the hell has the time to walk that much a day? Plus we do get quite a bit of rain, cold days, slippy roads, ice, high winds etc in this country - so the weather will not always suit... And quite a lot of people don't live in an area where they can actively do a four and a half mile walk comfortably or easily.
I'm very fortunate to live near canal, river, woodlands, country lanes etc... I can walk up for two and a half miles before I even get to an A road, and there's lots of woodlands and paths around the farmers fields that they've allocated for people to walk along. And they have made pathways through elephant grass and crops. I walk around two - to two and a half miles a day.
If I lived in the town I grew up in that I moved from 13 years ago, there's no way I could do those walks every day. I would be walking around footpaths, alleyways, main roads, housing estates, industrial estates, shops etc... I used to have to drive around 6-7 miles to get to any decent amount of 'countryside' (where I could have walked for 2-3 miles and still been in the countryside.)
So as I said, I imagine most people would find walking 10,000 steps (four and a half miles or so) a day very difficult.
I actually find it a struggle occasionally even walking the distance I do, - when I'm busy doing other things or the weather's a bit dodgy. (I still do it but occasionally find it a struggle.) This past week has been a prime example. It's been below zero degrees here for a week, and the roads and paths are slippy! So it's been a challenge!
Walking is excellent exercise - as is swimming. (I do this too.) But I think going to the gym maybe two to three times a week if you can is good as well.... I don't go though ... I genuinely can't be arsed. I find my walking and swimming is enough for me. (I go swimming 4 to 6 times a month and swim 20-30 lengths.)