It's kind of sad that the pool of quality players is so bad in our areas (or the pool of good drummers willing to play with US is so small!) that, rather than fire the bad drummer and hire a GOOD one, we'd go and get a machine!
Unfortunately, at the time, we were sort of forced into getting the drum machine, for the reason you stated above, which was, in our case, the lack of quality players available. The good ones were already working steady.
Even sadder was our old former drummer, Jack, wound up in a wheel chair and is presently on methadone.
Living in an area with a relatively small population does have it's disadvantages.
The next group I played with, a 6-piece, called Sir Edmund, was fortunate enough to have a fine drummer, and, of course, having that interaction was wonderful.
However, the experience with the drum machine was very helpful later on when I started playing/teaching using the Yamaha Electone and eventually,the arranger keyboard.
Ian