The Constructs had a unique society as they were the only race that believed that technology was the future, even though it had already made incredible progress. For them, it was only part of the way to the real progress Nitra spoke of.
Only in a peaceful world, with no barriers to scientists and their studies, could the Constructs quickly fulfill their dreams. Other races felt that technology was nothing more than a convenience, most often useless, for this world had energy and creatures like Alucard.
What was the point of a cool laser cannon if someone with energy could deflect a devastating ray with a swing of his sword? Or, what was the point of research if in thousands of years, Constructs hadn't come close to the regeneration rate of regular Vampires, let alone Alucard?