Some modern disks, depending on firmware and applications, do in fact do a lot of remapping; they have wear leveling enabled, generally aimed at shoveling data such that the head tends to move less and give you better latencies. Wouldn't surprise me if normal disks are starting to that regardless of usage as reducing tail latencies never hurts much.

There is also a difference between remapping a sector and reallocating a sector. Remapping simply means the sector was moved for operational reasons, reallocating means a sector has produced some read errors but did read fine.

A disk can operate fine even with 10s of thousands of reallocated sectors (by experience). The dangerous part is SMART reporting you pending and offline sectors, doubly if pending sectors does not go below offline sectors. That is data loss.

But simpy put; on modern disks the logical block address has no relation to the position of the head on the platter.