Levistus's_Leviathan
5e Freelancer
It's not perceived. A level 20 sorcerer will literally be incapable of changing a single sorcerer spell for the rest of the campaign. Other sorcerers have to wait to level up to change a single spell. Having less spells and less opportunity for changing spells means that they are objectively less versatile than a wizard.Nor does complaining about a perceived lack of versatility entitle them to more versatility.
If enough people complain about something, maybe the correct thing to do is to assume that their concerns are correct, not that they're just whining, like you seem to be suggesting they are.