Vivado has free and paid tiers. The free tiers ("WebPack") support their a myriad of their smaller devices (which includes the Kria boards). The larger devices (Virtex, etc.), however, are generally only supported by the paid versions of Vivado.
It's inconvenient for hobbyists, sure, but for enterprise uses the cost of Vivado for a team is largely inconsequential (which I suspect is why they get away with this).
The licensing scheme is not terribly robust, either; there are a number of cracked (full) licenses floating around if you know where to look. Given that AMD makes most of their money on hardware sales, and the software is only really useful in conjunction with that hardware, I suspect they don't care very much.
It is clear from the quality that all vendors of EDA software actively hate their paying customers.
Just wonder - why are EDA tools just now starting to get HiDPI support? I’m pretty sure Altera, Xilinx/AMD, etc haven’t bought HiDPI monitors for their own developers!
It's inconvenient for hobbyists, sure, but for enterprise uses the cost of Vivado for a team is largely inconsequential (which I suspect is why they get away with this).