There is a question of situational utility. If you're trying to read a book, a Light Cantrip will be better than a Fireball, even though they both produce light and one is a cantrips while the other expends a 3rd level slot. So you can't expect /both/ always & inarguably.
A low-level damaging spell will probably be better than even a highly scaled cantrip in some instances. Magic Missile simply doesn't miss, for instance, it's inarguably better than missing, but cantrips don't /always/ miss, so inarguably but not always better.
Burning hands can hit several enemies if they're neatly arranged in a cone, and will do full damage to a swarm, and, again, won't miss - 1/2 damage is more than 0. Sleep can take a nearly-finished enemy down without killing him, cantrips, being all ranged attack rolls, cannot be used to 'subdue.'...(oh, no, wait, can you taser someone with a shocking grasp? that's amusing), …what's another damaging 1st level spell in 5e? … oh, of course, the voted-Iconic-in-the-first-playtest-survey Thunderwave, well, it pushes, cantrips can't do that.