There's just a lot happening with these shoes:

• the yellow contrast stitching
• the tassels
• the "penny-like" leather horizontal strap to which the tassels are attached to
• the kilt

Whoever was designing those knew they're mixing three types of loafers (tassel, penny, kilted). They're pretty much designed to grab attention. And with classic formal menswear the goal is to normally do the opposite.

Even if the rest of the outfit was perfect (e.g. if you had loose wool pants with a large leg opening to cover most of the shoes etc.) it'd still end up looking fashion forward at best if you pulled it off. It'd help if you're 18-22 yrs old.

I know it sucks having to buy yet another pair of shoes just to wear them once for a wedding. You still have a lot of time till October so maybe thrift/Vinted some cap toe oxfords till then?