Interesting point and assessment. By taxing energy for a specific usage the government does interfere with economic freedom.
In a free society people pursue goals they deem important individually and as such the input of time, labor or more generally "energy" is not considered wasteful. By taxing certain usages of energy the government does inhibit or at least hamper the pursuit of individual goals. This is moving society more to planned economic model (e.g. as in Communism, Socialism or Feudalism), where the central authority/planner decides the level of innovation desired in society, which is never ever (been) unbiased (humans).
Taxing energy does not seem a sensible approach, rather could the output achieved be subject to tax. One a more basic level: consider that food is energy/input factor too
and taxing food (following from taxing energy) would impact livelihood and in extremis the survival of people. Food (e.g. especially animal foods) is basically concentrated nutrients/energy.
Let's see whether this 30% tax announcement really comes into force of it's just a distraction for political/election reasons.
Keep up your critical thinking..