Replying to Advice using inserts for binding replacement (ATK)

Hello,

I am looking to install inserts on multiple pairs of freeride skis so I can just use the same binding (ATK Raider 13 EVO) for all of them. That would be so much cost-effective and would make a lot of sense.

I have spoken with an official ATK rep and they said the following regarding using inserts with ATK bindings:

"The use of the inserts makes it difficult to adjust the toe piece for the correct alignment between the toe piece and heel.
In 99% of cases, incorrect alignment is the main cause of bindings and pre-releases.
Another problem to check with the inserts is the possible protrusion beyond the top-sheet of the ski.
The bindings must be always perfectlly installed in contact with the ski."

I don't see what the problem is if the inserts are carefully installed with patience and using the right tools. I don't see how inserts can affect the "correct alignment" between the toe and heel piece of the binding.
It doesn't make sense to buy a 700$ binding x3 for using on 3 pairs of skis for instance.

Has anyone used inserts with ATK bindings?
What do you guys think about this and how is your overall experience using inserts?
What inserts would you recommend and is there anything to look out for?

Thanks a lot!