Tamron SP 150-600 G2 VC modes

[SuzukiGS750EZ]

Hey guys. A fellow forum member explained the modes briefly to me but rather than be a pain, I figured I'd ask here. I understand mode 1 is 50/50 view finder and lens, 2 is panning and 3 is just lens. In what situation would 3 be better than 1? And how much better? The amount of movement I see on mode 3 makes me feel like I'm learning how to shoot firearms again as a child lol. But I'd be disappointed if I missed a shot due to me liking a solid viewfinder.