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'm not going to write a history book to explain to you the common-knowledge of how Traditionalism started in the 60s and 70s.  If you don't already know this, then you're woefully uneducated on the topic and shouldn't even be talking about it.
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Suffice it to say, from the period of 1969 (when the new mass came out) til the period of 1988 (when new-rome started the indult mass), there were almost no TLMs said in parishes or dioceses across the globe.  Everything was the new mass.  Except those Trad priests who had left new-rome and found Trad laity, where mass was said in garages, hotel rooms, basements and rental halls.  Until they saved up $ to buy/rent buildings which were turned into chapels.  This took years.
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So for the period of almost 20 years, the only TLMs said on the planet were by Trad priests.  Not authorized by new-rome and not available in parishes/dioceses.  There was no FSSP.  No ICK.  No Summorum Pontificuм.  No indult TLMs.  Sure, there were some old, retired priests who said the TLM in a small parish chapel a few times a week.  But not on sundays.  Sundays, it was new mass or nothing.  This is historical fact.

1) Instead you have made several factually erroneous statements regarding protestantism,
2)have not provided evidence (beyond Fr. Wathen's book, of course) that most trad clergy used to hold said position,
3)and have insulted everyone who disagrees with you.
If you would like to provide actual evidence, I am open to considering it.

The red highlighted words in your above quote appear to be flying over your head....

No one's honor is at stake, of this there is no doubt - scratch this reason for going.
The OP's daughter's wedding has nothing whatsoever to do with any civil office, of this there is no doubt, scratch this reason for going. There is no grave reason, so scratch this idea too.

So with no doubts, with no honor at stake, with no civil office involved, and with no grave reason to attend at all, exactly what answer should be expected from the OP's bishop?