I see where you're coming from, lower thrust = longer time to reach the same rotate/climb speeds, which would be true all things being equal. However.....
Reduced thrust take-offs are typically done (assuming a long enough runway) combined with higher speeds, in "Improved Climb" take-offs. The benefits include reduced engine wear, reduced noise, better climb rate, better climb gradient, reduced fuel burn. I guess the increased tyre wear is insignificant or outweighed by the benefits.
Given a long runway, for a typical load in a 737, a full power launch may use, say, 92% thrust (N1) with a Vr (rotate speed) of about 135 knots. Improved climb take-off in the same situation might use only 86% thrust with Vr and V2
(rotate and initial climb) speeds typically 15 knots higher.
Regards - musang