All traditional 'costumes' are a little ridiculous to modern western eyes in the cold light of day (imo) but at the same time the historial link of pagentry and dressing up for tradition's sake does seem to appeal to human beings across a variety of cultures and countries.
Graduation gowns, wedding dresses, black tie, white tie, priests' robes, judges wigs and robes, highland dress, morning dress, bishop's mitres and croziers, the 'beefeater' uniform of the Yeoman of the Guard, morris dancers etc.
Just as unnecessary and over the top to some eyes as the gowns and regalia associated with royal events, I mean why do we make our armed forces wear their ceremonial uniforms for parades and not just their regular ones - what purpose does the bearskin hat really have in 2025?
@Plasticcheeeandgherkins why would you find specifically the British Royal family's traditional regalia any more ridiculous or on the other hand acceptable than any of the examples above?
It's okay to admit it's just because you dislike having a monarchy so much that it makes you more irrationally adverse to their costumes than anyone else's at home or abroad.
It's the same reason the Sussexes get a lot of what can seem like disproportional criticism from some people - once you are annoyed with someone every little thing they do irritates you.
Like a soon-to-be ex-DH chewing and breathing!