We look to the Church fathers and it can be seen clearly that abstinence from meat was a recommended practice among bishops and priests. Later just bishops. Disputes arose in and around the 4th or 5th century regarding abstinence from meat by the religious.
If you really would like to PROVE to yourself that we Catholics should seriously consider abstinence from meat frequently if not completely, it is an easy task.
First we should study the history of why food is offered to God first before consuming it. The act of preparation of food with the intention of consecrating it to God pre dates the Last Support Rite/Ritual.
Jews and Gentiles alike offered food on the altar to God, brought crops and harvests etc, to God and so on.
Now if Food is to be offered to God, prior to its consumption, then its preparation must too be offered.
Do you think you could slaughter an animal (particularly a mammal) whilst praying to Our Lord and making it an offering?
Likely ONLY if you were a tribal person who needed the animal for survival. However, in the supermarket, era of plenty, the answer is no.
Finally, the act of eating meat or abstaining is very closely related to Our Lord’s passion. It is a known fact that the Essenes were quite austere and likely abstained from meat. BUT the Passover required lamb slaughter and eating of meat.
The Lord ended the bloody ritual/rite of slaughtering the spotless lamb, and surrendered His own body and blood to establish the New Covenant in the Rite of Melchizadek.
We should strongly consider abstinence from meat in line with the tradition of our Church. Lent, Fridays, and Wednesdays.
*15If your brother is distressed because of what you eat, you are no longer acting in love. Do not by your eating destroy your brother for whom Christ died. 16Do not allow what you consider good to be spoken of as evil. 17For the kingdom of God is not a matter of eating and drinking, but of righteousness, peace and joy in the Holy Spirit, 18because anyone who serves Christ in this way is pleasing to God and approved by men.
19Let us therefore make every effort to do what leads to peace and to mutual edification. 20Do not destroy the work of God for the sake of food. All food is clean, but it is wrong for a man to eat anything that causes someone else to stumble. 21It is better not to eat meat or drink wine or to do anything else that will cause your brother to fall.* – Romans 14:15-21