I certainly wouldn't recommend Zen 5 over Zen 4 for gaming, but Zen 5 actually IS significantly faster than Zen 4 in a lot of applications already, and even in some games (Assetto Corsa being the prime example). There have been a lot of changes made to the architecture, MORE changes vs. previous generations since Zen 1 probably, and often it takes time before those changes become well optimized for in software. If they can find ways to improve performance through architectural changes which don't rely on software being better optimized for them, that's what they prefer to do, but sometimes achieving better performance potential requires incorporating new architecture designs and features which DO require significant changes or optimizations to software (and not necessarily just to the applications themselves, but to the OS, to compilers, etc.) So, Zen 5 performance vs. Zen 4 may yet improve significantly more over time, though it's hard to say how long that could take, or how much performance will improve in various applications.
It's important not to conflate benchmarks with the actual performance potential of a chip, just as it is important not to make any assumptions about how much better optimized software will become in the future for a given chip. The benchmarks don't tell the whole story, that's why channels like Hardware Unboxed will do new batches of benchmarks in new video releases for the same hardware multiple times in the years following the release of that hardware.
Also, keep in mind that gaming and DIY more generally is actually a relatively small portion of the total market for AMD's CPU sales. People are conflating the gaming performance and value of Zen 5 CPUs in Windows with their overall performance and value. It's not the same thing at all. For someone who wants an affordable workstation which doesn't require an extremely expensive motherboard, the 9950X actually already does offer excellent value, as it's not actually that much more than the 7950X, and definitely is better, and likely will improve more as software becomes better optimized for it. If you have good reason to put together a workstation (for actual work), then spending the extra $$ for the 9950X is likely well worth it.
Lastly, we should also consider that Zen 5's power efficiency is better (with stock settings) than Zen 4 CPUs, and that they also overclock better if you don't care about maximizing power efficiency.