A real answer depends a lot on your setup and what you play. If you're happy with the regular PS5 running your games at 60fps or 30fps with ray tracing, honestly the Pro isn't a must-have upgrade. The thing is the visual difference becomes more obvious in 4K with a quality TV - and then yeah, an extra 30-40% performance is the real deal, games run smoother, less texture pop-in, stuff like that. But if you're playing in Full HD or have a not-so-great TV, you won't really notice the difference for the price you're paying.
The marketing side definitely exists, because Sony launched the Pro at a pretty steep price and no discounts in the first few months - hardcore gamer stuff. Now, its tech is legit (PSSR, more VRAM, improved processor), so it's not just talk. The real question is: are you bothered by your current performance or is it more curiosity? Because if your games are running well and you're happy, save the money for when the next generation comes around. But if you really like ray tracing, want stable 120fps, or you're thinking about keeping your PS5 for another 5-6 years, then it makes more sense to consider it.