Considering how repetitive all of game actions are, they must have figured since there's no certain way to stop 3rd party software like autoclickers, they might just instead add it as internal feature for lazy people with limitations which could be lifted by paying more $$.
I still don't see any reason to complain about this one, as you already pointed out, there are a bunch of free alternative 3rd party tools to use, most of which are acknowledged by Plarium, so why not just use them instead of complaining?