Assuming it's tight enough that there's no play, any added resistance makes things worse. Steering/balancing involves a constant series of very small corrections. Free steering ensures that these happen quickly providing excellent response to small steering inputs.
Stiffer steering needs stronger inputs to respond, so the response doesn't happen until there are greater steering imbalances, costing you the precise handling you're seeking.
If you want more steering stability, the easiest way is to lower front tire pressure.
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