Salam
No, it isnt. On the day of judgment, allah will not ask you why you did not follow imam abu hanifa (rahimullah) or imam ash-shaafi'ie (rahimullah). He will ask you if you followed the sunnah of rasulullah (saw), and the easiest way to do that is to follow the salaf, as they were the first generation after him.
You can take opinions from the four schools of thougt and see which one is strongest, but sticking to one madhab when its opinions are weaker than another on a particular issue can even be sinful
May Allah guide us all
Wassalam