If I remove or ignore the restrictions placed on spellcasters and their spells by the rules as written, I should not be surprised that I have changed the balance of power. At that point, I need to change other rules in order to restore that balance of power. However, the argument (not YOUR argument) seems to be that we must allow the most liberal interpretations of each spell as can be imagined, fail to enforce any rules which would limit the spellcaster’s power and then accept that the fact that, if we ignore the rules, the game becomes unbalanced must mean that the rules are the problem. The refusal to read the rules as written, and take them as a whole, exaggerates any power disparity that might actually exists, and serves only to obfuscate any real issue.