I think the Packers would still be using Anders if he had missed one PAT. His FGs weren't great but they were acceptable for a first-year kicker.
But when you have 6 missed PATs, 7/13 from 40+, end the season on a playoff miss, then miss a gimmie in the preseason...you're not very good at anything. That's what did him in; he was a rollercoaster experience. If you are automatic from short and mid distance but weak in the leg, you can still get a job, or sacrifice some accuracy for power, but Anders wasn't giving you reliability in either way.