Almost every actress nowadays has played scenes in which they are shown in bed or in a state of undress or nude, including incidentally Cressida Bonas, an ex of Harry's. I remember decades ago the very respected Shakespearean actress Glenda Jackson doing an extremely graphic scene in the film 'Women in Love' and that was considered out of the ordinary. Nowadays no-one lifts an eyebrow. Participating in these scenes is called 'acting'. No-one associates the actor as a person with the role they have taken.
So Harry must leave the Royal Family and his duties because some members of the British public supposedly consider Meghan 'unsuitable'? And just how are the powers that be going to quantify this. By polling, a plebiscite, referendum? That is just patently absurd.
I adored Diana and still do. However, she was considered eminently suitable to be Princess of Wales by everyone, including the BRF. And look at how that ended!
As for the BRF funding, the Queen and Prince Philip are directly funded by Parliament as monarch and consort. No-one else in the family is. Some receive expenses when needed from the Sovereign Fund. The Queen also has the Duchy of Lancaster to fund her and help some relatives with their living expenses. That doesn't include Harry.
Charles is funded by the Duchy of Cornwall, and from that he gives allowances to the Cambridges and Harry. The Duchies of Cornwall and Lancaster are ancient and operate, as everything else does, with the approval of Parliament. They aren't directly funded by the British public.