Is there a legitimate reason for everybody and his brother being part of enty?

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enty used to be "energy type" and encompass primary, secondary, and final energy (pety, sety, fety). Now it includes useful energy, a gazillion emissions, peog as an oil-and gas aggregate, as well as the good and perm tradable assets.
Is there a legitimate case where they all have to be in the same set? Because that's blowing up all the variables and parameters involved and is quite confusing from time to time.