However, no requirement of celibacy to the priesthood would lead to changes having to be made for lay Catholic marriages that fail, particularly, in relation to ‘remarriage’.
This is what occurred in protestant religions, that allowed married clergy, i.e. divorce was/is acceptable and also orthodox where reasons of adultery and apostasy are also acceptable to end a marriage, and to remarry. Lay Catholics, in failed marriages where the spouse has committed adultery, etc… will eventually not accept not being allowed to remarry, if there is no example from the priesthood. It will have a knock-on effect.
It is the issue of re -marriage that is most contentious. All Churches recognize that remarriage is permissible upon the death of one spouse, and under the principle of the Pauline privilege. Apart from that commonality:
(a) the CC’s allow for remarriage under the Petrine privilege.
(b) the OOC’s allow for remarriage as a matter of oikonomia , only under 2 circumstances (adultery and apostasy, though under some theories, adultery is regarded as merely a form of apostasy; it is my opinion that permitting remarriage due to apostasy can be considered a species of the Petrine privilege).
© the EOC’s allow for remarriage as a matter of oikonomia for other reasons beyond the 2 generally accepted by the OOC’s, but I’ve also encountered the idea that remarriage is normative.