Dexter has also been in the top three or 4 BB's in the World for the majority of his career, so even if he was off, he was still a tier ahead of Victor in most cases. Victor's best years were 2007 - 2009, since then he's had major personal issues, including 1/2 a year lost. His last contest was 2011.
If he comes back now and gets bad placings, he risks a blow to his legacy. If he bows out gracefully, he can still get something going. He can pick up small / medium contracts probably. Perhaps try his hand at being a guru.
I just told you 99% of contracts expect you to compete, why would he stop when he will live like crap if he does, he can make some good money competing, contracts come with competing and he may not win the O but he won the last show he did, remember and he placed good in the Olympia, he could have easily placed second at the Arnold's this year. You don't stop competing when you can place top 3 at Arnolds, that is just dumb, unless he won the Olympia his legacy will not be tarnished at all.
Competing is everything at this level, exposure, publicity all stops the second you stop competing or at the least 80% of it does, that means forget about guess appearance where he makes 5k a pop, forget about contracts, forget about paid trips everywhere, horrible idea.