Dnd Dmg Spell Scroll Rules

RulesScroll

The rules for using spell scrolls can be found on pages 200-201 of the Dungeon Master’s Guide (DMG). Spell Scrolls are pieces of parchment inscribed with the words of a single spell. The words are written in a magical cipher that can only be read by a character who has the spell on their class’s spell list. On DMG 200, it lists the details for the base magical item spell scroll, which every scroll with a spell on it is. It specifies the following: If the spell is on your class's spell list, you can use an action to read the scroll and cast its spell without having to provide any of the spell's components.

I was under the impression that a Wizard could learn from a spell scroll by simply paying the 50 gold per spell level as defined on page 114 of the PH.
Copying a Spell into the Book. When you find a wizard spell of 1st level or higher, you can add it to your spellbook if it is of a level for which you have spell slots and if you can spare the time to decipher and copy it.
Copying a spell into your spellbook involves reproducing the basic form of the spell, then deciphering the unique system of notation used by the wizard who wrote it. You must practice the spell until you understand the sounds or gestures required, then transcribe it into your spellbook using your own notation.
For each level of the spell, the process takes 2 hours and costs 50 gp. The cost represents material components you expend as you experiment with the spell to master it, as well as the fine inks you need to record it. Once you have spent this time and money, you can prepare the spell just like your other spells.

However I then Read the DMG
DMG 200 said:
A wizard spell on a spell scroll can be copied just as spells in spellbooks can be copied just as spells in spellbooks can be copied. When a spell is copied from a spell scroll, the copier must succeed on an Intelligence (Arcana) check with a DC equal to 10 + the spell's level. If the check succeeds, the spell is successfully copied. Whether the check succeeds or fails, the spell scroll is destroyed.

Dnd Dmg Spell Scroll Rules Examples


Dnd Dmg Spell Scroll Rules Cheat

Does this mean that spells from spellbooks succeed always, but spells from scrolls have a chance to fail?
If so should NPCs charge more for Wizards to read their spellbooks instead of a scroll?

D&d 5e Using Spell Scrolls

What about for Ritual Caster? Learning from scrolls for that and Book of Ancient Secrets Warlocks should be the same, right?