On the flip side, I can envision a setting where emotional value is what determines the component for every spell. A chaste and moral wizard might need tears of a virgin as the component for Charm Person, where a lecherous individual might need a coin from a brothel to cast Charm Person. Each spell would need to be researched and the proper personal component would need to be discovered.
That would mean that scrolls which have the magic imparted by the inscriber would be usable by any wizard as a scroll, but not so much for putting in a spellbook. Research would have to be done on each spell, but since that would be cumbersome, some new rules to make it a bit quicker than a long quest or lengthy project would have to be enacted. It could be a very fun way to play magic.
There was (is there still? I never bothered with it) a cost and time value for scribing spells. Maybe it can be explained, in setting, because the wizard does this work to determine the spells components that work for him? Not default, but it would be a more flavourful magic if integrated to the setting.