Is it really important to concentrate on a perfect on-center smooth
landing every time, or to just focus on landing each flight safely?

I land on short runways, in very high density altitude, that are 25 feet
wide (sometimes with a ditch down the runway edge). So - answer your own
question. Any fool can land off centre when the runway is 125 ft wide -
when it's 25 ft wide - well, that takes a bit more precision.

Tony
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Tony Roberts
PP-ASEL
VFR OTT
Night
Cessna 172H C-GICE