The girls have nothing to be ashamed of. I’d hate for Eug I’d have to cut back in anyway just because there’s speculation (so far unproven no matter how bad it looks) about her dad. She should have whatever style wedding she wants and if it’s a blow out, go for it.
No the York Princesses have nothing to be ashamed of but because their father is out of sight and inaccessible, the additional public hostility to him could be and in some cases have been transferred towards them.
Also let us not forget that the past actions of their parents already tainted them in the eyes of some people.
So for their own sakes they need to make sure they do not give those detractors any ammunition to use against them.
Fine as long as UK taxpayers aren't expected to cough up
If the whole wedding and reception are at BP, security costs may be reduced and since BP is always in use as an event venue there may be little need for taxpayer funds.