That was part of the intent, although I've never subscribed to the view that cantrips actually make even 1st level spells pointless. Yes, at level 11, your firebolt will deal more damage than burning hands - if you're using burning hands against a single target.
They don't become pointless. But definitely the level 1 spells being used by low and high level casters are different. Some spells remain as relevant in low levels as in high, while some others suffer. Chromatic orb, for instance, is out-damaged or at least tied by most of the damaging cantrips after level 11.
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