I don't agree. Sendmail definitely has the weirder config file syntax, but (having set both up multiple times) both have the exact same setup technique—reading through the manual looking at the config options and copying/pasting the lines into the config.
There's not really any extra layers of weirdness unless you're digging down into the nasty .cf files (which you probably never ever need to do). The m4 is just a detail (so you end up commenting with "dnl").
The relative complexity of the files is about the same—my postfix server config is roughly the same number of lines as my sendmail server config. And each line is just a single conf thing. Sendmail isn't really more complicated at all. It's just ugly.
