Horses in the sims 4

Yes, to all of this!

Horses would be much more fun - and to follow on from your suggestions... The ability to build a stable and/or paddock... Be able to have a stable with a trough, hay basket (the thing horses eat out of, I don't know the 'technical name for this) and sugar cube - this way the horses can drink or eat independently (grow carrots to be able to treat a horse after a well-performed dressage event... Have the saddle, the outfits and the helmet... Tour the Sim world on horseback. Perhaps buy/rent and visit a stable instead as a visitable location from which to conduct one's horse riding fun... Be able to tie your horse at a bar as an 'Eco lifestyle' way of getting about... Be able to go for a horse ride with your BFF with the ability to use reigns to control the horse (or just be able to designate a pre-determined course) or just horse ride around the neighbourhood to get as a way to be/think on your own... I can't think of any horse-based careers apart from horse breeder and dressage/race jockey and these could be freelance careers...

The lack of cars in The Sims might limit the ability to use a horse box, but the box could still be a decorative in a stable yard or be a portal from the stable to wherever (like the mobile phone can be a form of travelling - I just imagine the mobile in the Sims 4 is a smartphone and using it to travel is someone calling for an Uber in one of my more contemporary games)... Given the small nature of the Sim neighbourhoods, cars aren't really very practical other than as decoration... Most work places are down the rabbit hole too and in the Sims 4 travelling to a specific lot is done in a very binary, non-fluid, way...

Personally, I was wanting horses for my monarchy game (I even had a knights' house with tiltyard, so horses don't have to be a purely military thing)...

I can't believe they have bikes and not horses...