Funny business this aviation thing !!
There are times when too much attention to detail will kill you and there are times when too little will kill you - same with speed on the approach - the secret is to know when to apply detail and speed.
+5-10 knots doesn't mean your destabilized but going into a short runway means you need to fly the numbers to meet the performance.
A long time ago I learned to respect the amount of hard work put in by people who did the data.