But before becoming priest there is a quite long training program (often 5-6 years). Dropping out of it is quite common.

And even after becoming a priest, they can asked to be relieved for their obligations, including celibacy. But in this case they would have to find an other job.

False on both counts!!!

First, divorce is a one-and-done sin. Someone who finalizes a divorce and confesses it is in a state of grace, much as someone who ate steak last Friday and confessed.it.

Now, a laicized priest is in no sin either, unless he attempts to hold himself out as a priest still. A man with a rescript from the Holy See is typically freed from all obligations of the clerical state, and that can and will often include celibacy, so a laicized priest is perfectly eligible for marriage, and perhaps a really good catch.

Do you have a source on this? Wikipedia is disagreeing with you https://it.wikipedia.org/wiki/Dimissione_dallo_stato_clerica...

I'm not sure where you see disagreement. It's not a personal sin for the priest to be dismissed. See #3, by request. Oh sure, a priest may be dismissed as a penalty, for something he did, namely sins such as abuse, but the dismissal itself is not sinful like procuring a divorce. The OP compared laicization to a divorce, and it's nothing like that at all.

Think of it this way: it's not a crime to go to prison, but one will certainly go to prison as the result of a crime.

Er, as a Catholic I'd be inclined to dispute this. I know a few ex-priests. One of whom has been happily married for years. Another became a C of E minister and also got married. Another left the priesthood for 17 yrs then eventually came back. My understanding is, its intended to be a lifelong commitment, but it doesn't always work out. A marriage can be annulled in the church if it is thought that one of both parties failed to fully understand what they were promising to each other or fully enter into the promise being a true commitment. That could be the case with ordaining a priest too. As well as the fact that being a priest is an extremely hard job as well as the celibacy requirement so some people come to the conclusion they are unable to fulfil the role properly.