No, a fish will instinctually swim away from that particular current. If a fish does not swim away from it, or cannot swim away from it, then the chances are that this fish is very weak (unless it is a fry of course). If a fish is that weak it is in a bad way and probably should be quarantined for the safety of the other fishes. Of course "lethargy" and "weakness" are common in numerous illnesses makin git difficult to determine what is the problem.
I lost 3 fish that were weak. From the time they were caught on the intake for the filter I lost one overnight, one 3 days later and one a week later. The final fish was moved to quarantine and fed antiparasite food, to no avail.
If you have no quarantine option you can put a sponge over the filter intake, that will soften the flow even more, though the filter floss is probably already doing that.
As long as the room temperature in your house is not too low you can also put him into a tupperware/rubbermaid container appropriate for his size. You can then either clean/change the water daily, or buy or use an extra filter you have around. You can put a heater in with them as well, if it has suction cups. Since it is a Goldfish the heater is not really all that necessary unless your house is regularly going below say 65. It is a cheap option for a quarantine tank
Hope that helps some.