Then, I would conclude that a priest who is "not forced not to have sex" can--and should--be fulfilled and happy--and affirmed by us-- in his freely chosen state of celibacy/chastity. 

If the priest gives prayerful assent to his commitment, nobody should question or demean his choice. Indeed, a voluntary celibacy vow should not be ended, but promulgated, in my opinion. It has value I clearly would not know by experience,  but value I see regularly in those who have chosen it and are happy with that discerned choice. 

I will say that while a life of permanent celibacy is something I from inexperience should not judge, appreciate,  evaluate, or claim to know, I would think a celibate by inexperience cannot claim to fully know and appreciate a non-celibate life of women and men.  

I think we agree. As you say, prayerful assent before God of another adult should be valued, respected, and praised-- and, today,  as you also note, priestly celibacy is surely in that category.