I'm doing it. I did it in 2017 too.
I don't think it's that easy for a lot of people. Personally it's required a bit of thought to get it in, because I drive to the cm, drive on to work, stay in one room most of the day (I walk round the classroom, but have to keep stopping to help kids), don't even leave the building at lunchtime as there's always someone who is on detention or needs help with homework, etc. Then I drive home via the cm again. There's not much more than 3/4,000 steps in my average day unless I'm thinking about it.
In 2017 I counted fitbit miles, and got to 1,200 miles, even though I had forgotten to charge/wear my fitbit sometimes. This year I'm going to just count my intentional walks, which will be more work but I think I can do it, or at least get close.