Not true, there is always talk about games that perform better on Ps5 that favor clock speeds .. but the fact is , more cus are a benefit in engines that take this into account .. if Sony could, they would have these high clock speeds and equal cus like series X, they couldn’t , because of reasons ( probably staying in budget) but the fact is engines are going for more parallel instructions . Compute heavy as you call it .. and they will become even more compute. Heavy. Couple this with what there is available in hardware on Series X, it is a pretty smart design, hardware VRS, SFS, Full meshshader support, if this all is leveraged you can go a lot further.
The problem is, you need to implement this all, and that costs money and time. And most develop for all systems .. so we will see how this sticks.