Henry
Autoexreginated
A quick comment on how easily spells "supplant" skills: Remember that, being spells, they are subject to detections, dispels, and anti-magic fields. Charmed people have charms wear off; diplomacy doesn't "wear off."
The silence spell is a global effect with a 20 foot radius; sneaking past a guard with a silence is tantamount to giving your presence away if they suddenly hear no sound at all by coming within the spell's area.
Also, spells have a limited duration, while skills may be used for up to 14,400 rounds per day.
Magical disguises are easily detected through spells, whereas a mundane disguise does not detect magically - it has its own different set of "tells."
Spells may be effective, but there are lots of situations where spells are not as effective as skill use. In the end, it's up to the DM to let the player shine, as in all cases.
The silence spell is a global effect with a 20 foot radius; sneaking past a guard with a silence is tantamount to giving your presence away if they suddenly hear no sound at all by coming within the spell's area.
Also, spells have a limited duration, while skills may be used for up to 14,400 rounds per day.

Magical disguises are easily detected through spells, whereas a mundane disguise does not detect magically - it has its own different set of "tells."
Spells may be effective, but there are lots of situations where spells are not as effective as skill use. In the end, it's up to the DM to let the player shine, as in all cases.