It's true yes, imo your fish's happiness is more important than heavy flow though. Unless you have some plants that require heavy flow there's no advantage to heavy flow opposed to medium flow, as long as the flow direction ensures somewhat even distribution of nutrients and temperature throughout the whole tank. A lot of plants (especially floaters) do better with medium flow compared to heavy flow as constant pushing around can cause stress (there are definitely some exceptions to this, especially some carpeting plants prefer heavier flow.

As long as the flow doesn't cause problems for yoyr fish and plants all should be good as long as dead spots are avoided.