Hi Camlim, yes many taboo can be quite nonsense.
However some of our parents mind about it, we do not want to quarrel with them about it since wedding is a happy occasion.
Other than this issue, there are other issues that they are strongly against, black details on wedding dress, black banquet theme(not too sure black/red cause it looks nice),
If your family had no concern about it will be great, not everyone is so lucky.
End of year might be expensive may not because of wedding, we must also factor in thing like company end of year D&D, union dinner, prom night, Christmas celebration.