A whole lot of hand wringing going on for what may be a knot or two. Do you "really" know what your aircraft weighs at any particular moment? Can you honestly hold your approach speed to that precision? Do you know exactly what the wind will be in the flare?
The FMC also produces a stab trim calculation to the hundredth digit. Can you even set it? Did you know that this setting is almost always wrong?
We used to have a saying at a previous employer about their approach to certain tasks: "Measure it with a micrometer, mark it with a grease pencil, cut it with a blow torch." This discussion kind of reminds me of that.
Yes, be close to approach speed when you start your flare. However, just as important: land in the touchdown zone, on centerline, no sideways drift, and (very, very important), throttles closed. Having your power up chasing a speed when you touchdown can cause you a world of hurt.
Bonus question: On the 737, would you rather have a crosswind from the left or the right? Why? How can you use that knowledge to your advantage with the wind straight down the runway?