I use the GoPro 6 as a linecam, works great.
For a kitecam it is unfortunately almost impossible to find good cameras (GoPro and similar are useless...), because the mobile phones has killed all motivation so the last MANY years, not a single new cam has come up - in fact the only one that worked well has been discontinued
So because everyone either use action cams super wide angle, or has mobile phones, some of them watertight, the watertight pocket cams with optical zoom, ideal for kitecams, are not developed anymore and has stagnated with years old models, ALL of them
Bugger, but how it is - I were lucky to find two old Sony cams used on EBay, so I can get by now as my current is worn out after lots of use.
The GoPro is not that expensive, if you look at it, the risk of losing it is zero if you mount it right, and can be used for years and got ALL the cool features and high quality
Even better, the remote is the best thing that has ever happened to action cams, so you dont waste loads of digital time/memory "going upwind doing nothing" ha haa