Ves often reminded himself of his principle that mechs should be treated with dignity. They should ideally be granted rights similar to those of humans as they could be just as intelligent and lively as the people they served.
While Ves recognized that mechs could never become fully equal to humans, they could still get close enough that the gap became irrelevant as far as everyone was concerned.
The way he treated the Sensia and the Furia at the moment violated his principles.
He took a natural adaptation process and sped it up so that months worth of familiarization took place in a matter of hours!
This was akin to rapidly maturing the body of a human clone. It was already unethical to make a clone in the first place, but to have it rapidly age so that it skipped its entire childhood made it even worse.