#1
ok. lets take the key of cmaj. cuz its simple.

im playing like the c ionian, and it fits the c and everything. BUT. each mode in the key of c, d dorian, e phrygian, etc. they all have the exact same notes in them. they start on a different note sure, but they all just have the abcdefg notes in them. so what is the point to moving around the different scales, because im always just going to be playing the exact same notes in each scale, with no different intervals, and no changed notes. so whats the point. please answer me on this one.
#2
You mean the different box positions, right? You move around the box positions to achieve a sound that you can't achieve in the current position you're in. Imagine yourself playing the greatest guitar solo ever. Are you staying in one area of the neck? I think not.
#3
sure they're the same notes, but it all depends on what note you end on. Your ending and beginning notes have huge impacts on the tone of your solo. if you take the a-minor solo, it is essentially a mode of C and has the same notes as a C-major scale, but it definitely doesn't sound like a C-major scale.
#4
but when the modes of the c maj scale all have the same notes, yes you can end on the notes that you want to emphasize, but cant you just resolve to the same notes on the c ionian, without having to move to a different mode?
#5
Certain intervals are usually emphasized more, usually the root, third, fifth, and seventh. By shifting the notes over into the second mode, the second degree of the major scale is now the root, the fourth is now the third, ect. This then gives you a different sounding scale to compose from, when in reality it's the same as the major scale, with different notes being emphasized.
#6
modes can be treated two ways

1.) more boxes to move around when you solo
2.) scales in their own right

'tis life