That may be - but I still didn't say what he/she implyed.
Cause "Blinking wasn't a problem until 3'rd party tools became common."
#1 Most people are too lazy to hit more than one macro for one action they want to perform.
#2 You have to deal with a limited line number and a limited set of accessibe macros. (before the big patch 200 macros at all, now 4.000)
#3 The majority played the game on PS2 or XBOX who can't use anything other than that what the game comes with.

With the ability to write macros that have an infinit number of lines and/or a scripted/(half)automated system where you can even change your whole gear by what you want to do without worrying about what day/weather/time/aso it is, more people became blinking on a regular basis.