no reason at all for a rosejoint to wear out that quickly, if they are the right spec for the application and booted to stop the crap getting in.
There are a number of different types of joint with various materials used - use an oiled ptfe linered genuine rosejoint of a suitable size with a rubber boot, and it will last ages.
I used plain bronze linered joints (cheap but jenuine 'Rose') in the rear 5-link suspension on my old MK2 rallycar, which I used every day for 3 years, and they were never a problem - just kept them lubed, and rubber boots in good order.

Don't forget that cossie rear arms are fitted with spherical bearings from the factory, and there are plenty running around 15 years later which are perfectly ok..