Er, no, it's not a peacetime consideration only. If the roads
collapse under the weight of your tanks, your vehicles' mobility
will be appreciably reduced, and if the ground beneath the road has
been extensively excavated for urban architecture like pipes,
electrical and telephone lines, etc, you may find your tanks
getting stuck in the ground!
Obviously, this will be less of a problem with respect to, say,
roads in rural areas, but in urban or suburban areas, where the
ground has been hollowed out quite a bit to make way for
considerable underground construction, it would be a real
issue.
And then of course, there's also the problem of bridging - most
bridges in this part of the world, which is dominated by rural
terrain, are simply not designed to bear the weight of 40-50 ton
MBTs.
In Europe and the Middle East (the theatres of war in which most
MBTs have been designed to operate), this is not really a problem
because there is enough open terrain such that MBTs can forego the
roads and just travel cross country. In SE Asia, which is mostly
forested, this is clearly not an option.