From Mr. Dawson's Wikipedia page:
......Dawson was released by the Steelers following the 2000 season partly due to these injuries and partly due to
salary cap reasons, but opted to retire rather than trying to play for another team.
See, use you up and cut you loose is the Steeler way.
Joe Greene, Carnell Lake, and Jerry Olsavsky were all on the Steelers staff this past season (Greene remains in scouting, and Lake remains as DB coach... Olsavsky, I believe, went on to a promotion as LB coach for another team over the last few weeks). All of these guys are former Steelers players.
In previous seasons, Darren Perry, Kevin Greene, Greg Lloyd, and other somewhat recent players have either served time on the Steelers coaching staff, or spent time at training camps teaching techniques. You can even go back further... Tony Dungy spent time on the Steelers coaching staff. Again, all of those guys are former Steelers players.
I am sure if I bothered to dig deep enough, I could find as many examples of "loyalty" going both ways, as you can find examples of no loyalty. I have no clue, however, why you think it's a "Steelers" thing... it is the business of the NFL. Who is your team? I am sure I can find as many examples of "disloyalty" as you can of "loyalty" with pretty much every team. LOL...
-Rich