Let's use this analogy.

Bleeding releases the evil spirits making a person sick.

If you do not know what you are doing anything could make sense to you.

The ONLY job of a factory installed ammeter is to measure the current into or out of the battery, period. The output of the alternator will have no change on that.

If you improperly wire accessories (feed off the battery rather than the alternator) then you will have problems regardless of alternator, stock or upgraded.

Much like bleeding, if you do not know what you are doing, don't do it.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.