Hmm I would say most properly tech sections are actually harder the faster you go, but maybe we are coming from a different perspective.
I’m guessing it’s not a linear thing.
Too slow and you have to do a lot to get the bike moving -1/4 cranks etc. in a more trials style. Thinking mainly of descending stuff like rocks, but the same could be said for ups.
Too fast and you can’t react, maintain traction, plan and execute the technique properly and the consequences go up. When your going slow stopping isn’t as much of a problem, at speed the dismount or foot down becomes much harder.
Somewhere in the middle is the sweet spot for most people, the wheels are rolling, the suspension is working and flow is happening.
If you are going to be riding slower then the thing that will help the most is decent low speed compression damping, the last thing you want is the fork to be diving when dropping a series of steps etc. So in answer to the question, yes – most bikes but I’d be looking at a different set-up for going slower than going flat out through stuff.