Yes as a matter of fact, it appears Jesus was crystal clear. Yet, the Catholic Church ignores this simple statement. Why?
It is not ignored, rather followed. Catechism has:
2382 The Lord Jesus insisted on the original intention of the Creator who willed that marriage be indissoluble.174 He abrogates the accommodations that had slipped into the old Law.175
Between the baptized, "a ratified and consummated marriage cannot be dissolved by any human power or for any reason other than death."176
2383 The *separation *of spouses while maintaining the marriage bond can be legitimate in certain cases provided for by canon law.177
If civil divorce remains the only possible way of ensuring certain legal rights, the care of the children, or the protection of inheritance, it can be tolerated and does not constitute a moral offense. 2384 *Divorce *is a grave offense against the natural law. It claims to break the contract, to which the spouses freely consented, to live with each other till death. Divorce does injury to the covenant of salvation, of which sacramental marriage is the sign. Contracting a new union, even if it is recognized by civil law, adds to the gravity of the rupture: the remarried spouse is then in a situation of public and permanent adultery:If a husband, separated from his wife, approaches another woman, he is an adulterer because he makes that woman commit adultery, and the woman who lives with him is an adulteress, because she has drawn another’s husband to herself.178
174 Cf.
Mt 5:31-32; 19:3-9;
Mk 10:9;
Lk 16:18;
1 Cor 7:10-ll.
175 Cf.
Mt 19:7-9.
176 CIC, can. 1141.
177 Cf. CIC, cann. 1151-1155.
178 St. Basil,
Moralia 73,1

G 31,849-852.
Haydock commentary on the Gospel of Matthew 5:32: “But I say to you, that whosoever shall put away his wife, excepting for the cause of fornication, maketh her to commit adultery: and he that shall marry her that is put away, committeth adultery.”
Excepting the cause of fornication. A divorce or separation as to bed and board, may be permitted for some weighty causes in Christian marriages; but even then, he that marrieth her that is dismissed, commits adultery. As to this, there is no exception. The bond of marriage is perpetual; and what God hath joined, no power on earth can separate. See again Matt. xix. 9. Wi. — The knot of marriage is so sacred a tie, that the separation of the parties cannot loosen it, it being not lawful for either of the parties to marry again upon a divorce. Aug. de bon. conjug. c. vii. B.