What is the laziest path to power?

[noob]

warlocks must adhere to all adventurer rules too. mainly they endlessly practice their craft during downtime and must train everyday or their skills will wane.

ranged attack rolls dont happen magically. only adventurer level of practice and training can use range attack rolls as good as the stat blocks says.

read bard description. they gain magic through performing vocally. the difference between a commoner and a bard is just music. charisma is just an indication of how strong the bards personality is.

A bard with 9 charisma literally can not cast bard spells.
Also I have never seen a rule saying adventurers practice their craft in their down time: can you show the rule text?
A warlock could still use their abilities fine with a _ in int, con, dex, str and 1 wisdom and 1 charisma so it is arguably way easier to do invocations than bardic spellcasting.
But in terms of lazyness what you have told is basically that any class based way to power lacks lazyness because in your words " all adventurer rules too. mainly they endlessly practice their craft during downtime and must train everyday or their skills will wane."
Meaning that a path to power that involves classes is not lazy according to your invented rule(unless you can show me the paragraph in the manuals).