Unlike polly I'm going to assume your job is not your image so yes to you an outfit is just that but to her this wedding has been a money making opportunity. Many influencers make serious bank from their wedding so the fact that we are underwhelmed by her aesthetic ain't great. My husband works is a musician so the music was extremely important to him at our wedding, me I couldn't have cared less.
Weddings are the day you and your spouse are going to be photographed the most in your life, probably spent more money than ever before on an event and very time consuming to plan, so you want to look your best. Wedding also are two people coming to together so I don't think its too much to expect cohesive outfits from the bride and groom, this is normal across many cultures, particularly when the bride is paid for her sense of "style"

I will say i that at the very least, he looks like himself whilst polly gives very much fashion victim. If you look at her first wedding (which was less than 10 years ago) her style is vastly different, very 2010s. I don't think she has any sense of personal style compared to say Lu or Nana at sheerluxe. If she gets married a third time, much like her first 2 weddings, her outfits will just be an amalgamation of what was trendy for weddings at the time.
Is it really important though? Like, to me, it's just a wedding, which is just a party, and an outfit... I realise this will be an unpopular opinion