Steering column rebuild 67 barracuda

I'm just curious...why are you adding a bearing at the lower column location? I'm at a similar quandary on my 71 Demon column that does not have one but has the external wire clip holding nothing. (This is an auto trans floor shift car/column.) My column is roughly 2" id with the 1" shaft so I likely could get a bearing in there. Just not sure why it may be needed since the coupling acts to support the shaft and provide for any misalignment at the lower end.