Anvis nodded with clear understanding, a very standard viewpoint of the Conservative Party nobles.
They do not truly fail to see the benefits of the Magic-guided Mechanical; they only worry that the emergence of Mechanical will lead to too drastic a change in the underlying rules of the game, thus being unfavorable to the current stable rule.
The origin of Mechanical comes from the Continent Magic Council, from Sky City. Although the high-ranking members of the Conservative Party are unable to do anything about it, they can strictly limit the civilian use and popularity of Mechanical.
Prince Ville's view, purely in theory, isn't problematic.
The development of Magic-guided Mechanical indeed has a ceiling, with the greatest limitation being the performance of materials, which makes them particularly fragile in the face of High Rank powerhouses.