Not offense, as we recognize that it is the Catholic teaching on Orders and Apostolic Succession. We just disagree.I think most Lutherans would take offense at that.
Additionally, Catholic clergy do not seem to take an all-or-nothing view of Lutheran Orders and Eucharist as ne might find amongst more conservative laity, as one finds here at CAF.
As an example,
nccbuscc.org/seia/koinonia.shtml
From Joseph Cardinal Ratzinger, in a letter to German Lutheran Bishop Hanselmann:
JonI count among the most important results of the ecumenical dialogues the insight that the issue of the eucharist cannot be narrowed to the problem of ‘validity.’** Even a theology oriented to the concept of succession, such as that which holds in the Catholic and in the Orthodox church, **need not in any way deny the salvation-granting presence of the Lord ****[Heilschaffende Gegenwart des Herrn] in a Lutheran [evangelische] Lord’s Supper.