It is said that residential houses do not need to look at Feng Shui.

We can't say it so decisively. Usually, the geomantic omen in the residential area can't be changed.

Therefore, there is no need to find a geomantic omen, but under very special circumstances, the wind and water in the residential area are very poor, which will definitely have an impact on the people living there.

so, from the perspective of probability, what you said is right. But certainly not

can be completely right.