But it's Bangladesh which has much more to lose.
Bangladesh is a fast growing economy whereas Myanmar is a heap of dung.
If they start bombing your ports and textile factories it's more damage than you wiping out 7000-8000 Myanmar soldiers
Also the deeper you advance the more armour you will face and given your geography not much armour you could sent to back up your superior infantry
That is something that BD has to think about but like I keep repeating Myanmar airforce is neither large or sophisticated enough to carry out many attacks.
Major targets will be protected by the excellent 15km range FM-90 SAM that can engage targets flying up to 6km high. This means that any bombers will be within range. BD airforce will also be something that they need to try to destroy and that will take some time, and so BD army will have either conquered Arakhan or nearly have done so by the time MAF faces no opposition in the air.
Myanmar knows what BD army will do to them in Arakhan if they wantonly try to attack BD civilian targets. Their soldiers will be simply slaughtered without mercy.
PS - you know that BD has thousands of textile factories?