As a slight aside. Why do you feel the need to promote diversity in cycling? As in what barriers to entry have you seen that you feel need to be overcome?
I can appreciate it in group activities where people might feel discriminated against or scared to be the only person of a certain age/ethnicity/religion/gender etc, then yes absolutely it needs help to become inclusive. I myself have only just got into cycling. I went on
Ebay and purchased my bike, I then ordered and fitted new tyres. I now go out and ride my bike in the countryside now and then and have entered a sportive. I fail to see how variation in the personal characterisics I have listed above would restrict anybody else in this country from doing the same.
Sometimes people/communities make their own barriers, or are just not interested.
I guess the op enjoys his cycling, as do we all otherwise we wouldn't be here.
And as befits a decent human being he would like other people to be able to get all the same benefits and enjoyments out of cycling too.
He has identified that there seem to be fewer women and BAME people out on bikes, compared with the proportions of those groups of the general public, and laudably he would like to try to address that.
In part because he has daughters of his own , but i'm sure its also because as mentioned before, he is a decent human being who would like to see everyone get the chance to enjoy, what he enjoys.
Personally i'm mainly a solitary cyclist locally here in deepest Devon, and solo tourer / bike packer further afield - ( if 'bike packing' is defined as touring and wild camping)
This solitariness is mainly by choice - i love the freedom, the ability to go wherever I like under my own steam, the sense of pace (I go hiking too) the ability to get on with it if feeling speedy, or meandering along if that suits better, unexpected encounters, all that stuff.
i'd love it if everyone from whatever back ground could join in, without feeling restricted in any way.
But that isn't reflected in the demographic i see doing such things.
Some women express fear of being out in the countryside, on the roads, or camping out in the wilds by themselves.
As an aside i'm also quite involved in a small scale farmers union trying to encourage more opportunity, and better diversity within the food growing sector.
There are definitely gender and ethnicity barriers there too - i know a lot of BAME people say they don't feel so welcome in the countryside.
If we just leave things to evolve slowly and 'naturally' - almost nothing changes - its just business as usual.
I didn't used to believe in positive discrimination, and so forth, i thought everyone should just get opportunity based on merit, but over the years i realise that there are many barriers , hidden and otherwise to people of all backgrounds having the same chances , so we do need to go out of our way, sometimes, to level the playing field somewhat.
Even recognising that the playing field isn't level for everyone is a good first step.