My understanding is that, in addition to killing other tanks, tanks can be used to destroy enemy strong points and structures/fortifications both with more prec

My understanding is that, in addition to killing other tanks, tanks can be used to destroy enemy strong points and structures/fortifications both with more precision and faster response time than artillery or airstrikes, preserving the lives of friendly infantry. (Tanks usually carry more than one type of ammunition for their main gun, e.g. https://man.fas.org/dod-101/sys/land/120.htm https://man.fas.org/dod-101/sys/land/120.htm , allowing them to serve multiple roles.) They also help counter the IFVs/APCs that the enemy is using to transport and support their infantry.