If you're talking about individual games then there will always be lazy devs. But what's ironic is that RT is supposed to save them effort, not add to it, which is also something we've also discussed at length in this thread.
It saves time for artists. It definitely doesn't save time for programmers - they still need to faff around with engine etc. And it never promised saving time for anyone but artists either. However, some of the performance issues are caused by programmers and some are caused by artists who just don't know how it works and do silly things. Also, we need much faster GPUs than any currently existing ones to get to the point of "turn it on and it just works" - because we are nowhere near that performance, developers have to use a bunch of tricks and these require special treatments. Like for example overlapping too many light sources causing them to converge too many rays over same pixels will generate so much noise it will overwhelm denoiser and fixing quality will kill performance - artists have to be aware and not do such things. UE provides tools for them to be able to see exactly what's wrong and fix it but they often don't do it anyway - and that's just lazy.
Whether its the devs fault, Epics fault for poor documentation/knowledge transfer, or publishers is anyone's guess,
It's not - most Devs and publishers seem to be switching to UE5 because it has by far best support. It might not be ideal engine but it's elastic and there's so many guides, documentation and community around it that it's making things much easier (and by that cheaper to develop). Which is also why the main focus of my posts is on UE5 - it's the main engine which is to be used in nearly all AAA games soon.
But your references are towards UE5 games of which I have personally played 2 - senua and wukong. I've played plenty others not in UE5.
I've played quite a few, including few that were total financial flops as nobody bought them, just to see how it works. Not great, in many places - stuttering and lower than expected FPS. Now, Senua is awesome visually - waking simulator yes, but will optimised and just artistically really really well made. These Devs know what they are doing, it's one of my benchmarks of how realistic games should look and visually much better than the new Indiana Jones game (especially faces). Wukong started badly with optimisation but they are working on it actively and it's always been quite scalable, so generally also a well made game for wide array of hardware. Sadly, these are some of the very few actually very good games on UE5 - most other are just awful.
Let me remind you of the stats on the front page:
You have very curious way of reading stats. The last, main stat is clear to me and I don't get how anyone can understand it differently - not worth the cost. If it was cheaper GPUs that could run it, or hugely better visuals than make the game or any other reason that would make it worth it, people would use it. But as it's now, it's not worth it so it's not being used.
Considering most users sit by far on xx60 class GPUs and that never changes, it's not going to change till GPUs running RT properly will be in the xx60 price range. As this is also huge majority of the gaming market, they will simply not buy games that don't run well on their hardware and they will not go for higher tier cards but will switch to consoles instead if forced, or will simply play other games (plenty coming out each month) - as that's been always historically the case. In effect, publishers that do not make good games which also run well on such hardware will suffer financially - which is exactly what we see happening to AAA games for a while now and why Ubisoft is pretty much bankrupt and why studios are getting closed left and right by other publishers, whilst reporting huge losses from such games. Something has to give and it's not going to be the average Joe, it seems. And that's what why I don't believe enthusiasts are large enough market to sustain it and instead everything will be dragged down back to the mainstream as that's the actual source of monies. This is also where AMD is aiming with their coming GPUs (or so they claim).