Which is why they're worthless if that's what you have them doing.
I was chief architect for a startup and my job was basically filling in for everyone else wherever I could. I did all the documenting no one had time to do. I took every task I could off of the senior engineers so they could focus on shipping code. I tried to be that guy that had the whole system in my head, meaning I had to watch all the commits, regularly build, run, test and debug the system.
The most typical software architecture work I did was prototyping, but in this case, it was generally evaluating a set of clearly practical options so that we wouldn't waste everyone's time trying to make a decision. Again, this was so that the engineering team could actually get sh!t done instead of arguing about useless technical bikesheds. Any prototype had to be the sort that the developers could directly use as a seed for building the next feature on the backlog.
To me, that's what an architect is about. It's the job that any good senior engineer should be able to do and should absorb, as much as possible, all the crap that keeps those senior engineers from being as productive as possible.