Quick Question - PreSeason Ranked

What if any, is the value of climbing real hard in the preseason? I understand the soft reset, which in low elo (my current home) means exactly 1 tier below to start, and if I win all 10 I can start where I landed end of season otherwise ill be lower because that's life.

My question is, can I climb high enough to raise that low end? Example, I end silver 4, my low end placement is bronze 4...can I climb to gold 5 and raise the floor to silver 5? or does it not work that way?