This is conflating two things: The stuck, and the suck.

As the author says, the time you spend stuck is the time you're actually thinking. The friction is where the work happens.

But being stuck doesn't have to suck. It does suck, most of the time, for most people; but most people have also experienced flow, where you are still thinking hard, but in a way that does not suck.

Current psychotechnology for reducing or removing the suck is very limited. The best you can do is like... meditate a lot. Or take stimulants, maybe. I am optimistic that within the next few decades we will develop much more sophisticated means of un-suckifying these experiences, so that we can dispense with cope like "it's supposed to be unpleasant" once and for all.