This is really how it is.
You have an armored division in Multan, but the enemy airforce, instead of targeting the tanks, targets the tank transporters. Result, a big dilemma for the GOC, only option left is that tanks will have to go on their own tracks till the border, ruining the roads and expending their fuel as well, God knows how many times they'll have to be refuelled.....additional logistics problems. This was just an example.
Every critical asset, such as tanks, AD, PAF, navy etc, has a VULNERABILITY. Superior maneuver, as we call it in military terms, can be that instead of targeting head-on these critical assets which will surely be well defended as well, you target their VULNERABILITIES, basically the needs of these critical asset. This way, you can isolate the critical asset and it will not be able to perform like it was planned to be.
Similarly, if, between the present location of an asset and its intended location, there are a number of bridges, then one can be sure that an attempt will be made to destroy those bridges from outset, maybe by the rival airforce. Measures to mitigate such actions include, strong AD around the bridges, placing of additional engineer bridges at the sites to replace or construct a new one rapidly, or.....our airforces can take out or suppress the airfields from where the enemy aircraft are supposed to sortie out. Multiple solutions are there.
From an offensive point of view, an offensive formation, keeping in view its intended area of operation of future, always, as part of good planning, takes necessary number of engineer bridges with itself in order to construct in case there are no bridges on the way or the enemy destroys its own bridges.