I think realistically kiters', at least in the waves, have the same issue that we do it's just that their low end is probably 5kts less. They suffer the same issue, "using a big kite feels crap, they turn slow etc etc" it's the same with us and larger wave sails; it's just not as fun so most don't even bother.
The difference is that I think at around 15kts kiters' are starting to shred waves on 10m kites, which seems the standard 'big' size wave kite here these days, maybe a 12. For us, even light weights like myself, it's 18-20kts before you are really well powered to jump/loop going out etc and generally bawse spec stuff

There are times when it's 15kts and I'm bogging out and I see the kiters charging out that i'm somewhat jealous and also in small conditions when it's hard to generate the wave power on a windsurfer and they can but I'm yet to relent. And to be honest I think now days the window between the two is pretty small, particularly for someone light like myself.
As for kiting/windsurfing in 5-10kts, only people who are a bit crazy do that. Like said above get a boat